Exhibit 3.2

                              AMENDED AND RESTATED
                                     BY-LAWS
                                       OF
                                W. R. GRACE & CO.
             INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

                                    ARTICLE I

                               OFFICES AND RECORDS

      Section 1.1. Delaware Office. The principal office of the Corporation in
the State of Delaware shall be located in Wilmington, Delaware, and the name and
address of its registered agent is The Prentice-Hall Corporation System, Inc.,
1013 Centre Road, Wilmington, Delaware.

      Section 1.2. Other Offices. The Corporation may have such other offices,
either within or without the State of Delaware, as the Board of Directors may
designate or as the business of the Corporation may from time to time require.

      Section 1.3. Books and Records. The books and records of the Corporation
may be kept outside the State of Delaware at such place or places as may from
time to time be designated by the Board of Directors.

                                   ARTICLE II

                                  STOCKHOLDERS

      Section 2.1. Annual Meeting. The annual meeting of the stockholders of the
Corporation shall be held annually (a) on the tenth day of May, or (b) if such
day be a Saturday, Sunday or a holiday at the place where the meeting is to be
held, on the last business day preceding or on the first business day after such
tenth day of May, as may be fixed by the Board of Directors, or (c) on such
other date as may be fixed by the Board of Directors.

      Section 2.2. Special Meeting. Subject to the rights of the holders of any
series of stock having a preference over the Common Stock of the Corporation as
to dividends or upon liquidation ("Preferred Stock") with respect to such series
of Preferred Stock, special meetings of the stockholders may be called only by
the Chairman, by the President or by the Board of Directors pursuant to a
resolution adopted by a majority of the total number of directors which the
Corporation would have if there were no vacancies (the "Whole Board").

      Section 2.3.  Place of Meeting.  The  Chairman,  the President or the
Board  of  Directors,  as the  case  may be,  may  designate  the  place of
meeting for any annual





meeting or for any special meeting of the stockholders called by the
Chairman, the President or the Board of Directors. If no designation is so made,
the place of meeting shall be the principal office of the Corporation.

      Section 2.4. Notice of Meeting. Written or printed notice, stating the
place, date and time of the meeting and the purpose or purposes for which the
meeting is called, shall be delivered by the Corporation not less than ten (10)
days nor more than sixty (60) days before the date of the meeting, either
personally or by mail, to each stockholder of record entitled to vote at such
meeting. If mailed, such notice shall be deemed to be delivered when deposited
in the U.S. mail with postage thereon prepaid, addressed to the stockholder at
his address as it appears on the stock transfer books of the Corporation. Such
further notice shall be given as may be required by law. Only such business
shall be conducted at a special meeting of stockholders as shall have been
brought before the meeting pursuant to the Corporation's notice of meeting.
Meetings may be held without notice if all stockholders entitled to vote are
present, or if notice is waived by those not present in accordance with Section
6.4 of these By-laws. Any previously scheduled meeting of the stockholders may
be postponed, and (unless the Certificate of Incorporation otherwise provides)
any special meeting of the stockholders may be cancelled, by resolution of the
Board of Directors upon public notice given prior to the date previously
scheduled for such meeting of stockholders.

      Section 2.5. Quorum and Adjournment. Except as otherwise provided by law
or by the Certificate of Incorporation, the holders of a majority of the
outstanding shares of the Corporation entitled to vote generally in the election
of directors (the "Voting Stock"), represented in person or by proxy, shall
constitute a quorum at a meeting of stockholders, except that when specified
business is to be voted on by a class or series of stock voting as a class, the
holders of a majority of the voting power of the shares of such class or series
shall constitute a quorum of such class or series for the transaction of such
business. The chairman of the meeting or a majority of the shares so represented
may adjourn the meeting from time to time, whether or not there is a quorum. No
notice of the time and place of adjourned meetings need be given except as
required by law. The stockholders present at a duly called meeting at which a
quorum is present may continue to transact business until adjournment,
notwithstanding the withdrawal of enough stockholders to leave less than a
quorum.

      Section   2.6.   Proxies.   At  all  meetings  of   stockholders,   a
stockholder  may vote by proxy  executed in writing (or in any other manner
permitted  by  law)  by  the   stockholder,   or  by  his  duly  authorized
attorney-in-fact.

      Section  2.7.  Notice  of  Stockholder   Business  and   Nominations.
(A)  Annual


                                      -2-



Meetings of Stockholders. (1) Nominations of persons for election to the
Board of Directors of the Corporation and the proposal of business to be
considered by the stockholders may be made at an annual meeting of stockholders
(a) pursuant to the Corporation's notice of meeting, (b) by or at the direction
of the Board of Directors or (c) by any stockholder of the Corporation who was a
stockholder of record at the time of giving of the notice provided for in this
Section 2.7, who is entitled to vote at the meeting and who complies with the
notice procedures set forth in this Section 2.7.

      (2) For nominations or other business to be properly brought before an
annual meeting by a stockholder pursuant to clause (c) of paragraph (A)(1) of
this Section 2.7, the stockholder must have given timely notice thereof in
writing to the Secretary of the Corporation, and such other business must
otherwise be a proper matter for stockholder action. To be timely, a
stockholder's notice shall be delivered to the Secretary at the principal
executive offices of the Corporation not later than the close of business on the
60th day nor earlier than the close of business on the 90th day prior to the
first anniversary of the preceding year's annual meeting; provided, however,
that in the event that the date of the annual meeting is more than 30 days
before or more than 60 days after such anniversary date, notice by the
stockholder to be timely must be so delivered not earlier than the close of
business on the 90th day prior to such annual meeting and not later than the
close of business on the later of the 60th day prior to such annual meeting or
the 10th day following the day on which public announcement of the date of such
meeting is first made by the Corporation. In no event shall the public
announcement of an adjournment of an annual meeting commence a new time period
for the giving of a stockholder's notice as described above. Such stockholder's
notice shall set forth (a) as to each person whom the stockholder proposes to
nominate for election or re-election as a director all information relating to
such person that is required to be disclosed in solicitations of proxies for
election of directors in an election contest, or is otherwise required, in each
case pursuant to Regulation 14A under the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), and Rule 14a-11 thereunder (including such
person's written consent to being named in the proxy statement as a nominee and
to serving as a director if elected); (b) as to any other business that the
stockholder proposes to bring before the meeting, a brief description of the
business desired to be brought before the meeting, the reasons for conducting
such business at the meeting and any material interest in such business of such
stockholder and the beneficial owner, if any, on whose behalf the proposal is
made; and (c) as to the stockholder giving the notice and the beneficial owner,
if any, on whose behalf the nomination or proposal is made (i) the name and
address of such stockholder, as they appear on the Corporation's books, and of
such beneficial owner and (ii) the class and number of shares of the Corporation
which are owned beneficially and of record by such


                                      -3-



stockholder and such beneficial owner.

      (3) Notwithstanding anything in the second sentence of paragraph (A)(2) of
this Section 2.7 to the contrary, in the event that the number of directors to
be elected to the Board of Directors of the Corporation is increased and there
is no public announcement by the Corporation naming all of the nominees for
election as director or specifying the size of the increased Board of Directors
at least 70 days prior to the first anniversary of the preceding year's annual
meeting, a stockholder's notice required by this Section 2.7 shall also be
considered timely, but only with respect to nominees for any new positions
created by such increase, if it shall be delivered to the Secretary at the
principal executive offices of the Corporation not later than the close of
business on the 10th day following the day on which such public announcement is
first made by the Corporation.

      (B) Special Meetings of Stockholders. Only such business shall be
conducted at a special meeting of stockholders as shall have been brought before
the meeting pursuant to the Corporation's notice of meeting. Nominations of
persons for election to the Board of Directors may be made at a special meeting
of stockholders at which directors are to be elected pursuant to the
Corporation's notice of meeting (a) by or at the direction of the Board of
Directors or (b) provided that the Board of Directors has determined that
directors shall be elected at such meeting, by any stockholder of the
Corporation who is a stockholder of record at the time of giving of notice
provided for in this Section 2.7, who shall be entitled to vote at the meeting
and who complies with the notice procedures set forth in this Section 2.7. In
the event the Corporation calls a special meeting of stockholders for the
purpose of electing one or more directors to the Board of Directors, any such
stockholder may nominate a person or persons (as the case may be), for election
to such position(s) as specified in the Corporation's notice of meeting, if the
stockholder's notice required by paragraph (A)(2) of this Section 2.7 shall be
delivered to the Secretary at the principal executive offices of the Corporation
not earlier than the close of business on the 90th day prior to such special
meeting and not later than the close of business on the later of the 60th day
prior to such special meeting or the 10th day following the day on which public
announcement is first made of the date of the special meeting and of the
nominees proposed by the Board of Directors to be elected at such meeting. In no
event shall the public announcement of an adjournment of a special meeting
commence a new time period for the giving of a stockholder's notice as described
above.

      (C) General. (1) Only such persons who are nominated in accordance with
the procedures set forth in this Section 2.7 shall be eligible to serve as
directors and only such business shall be conducted at a meeting of stockholders
as shall have been brought before the meeting in accordance with the procedures
set forth


                                      -4-



in this Section 2.7. Except as otherwise provided by law, the Certificate
of Incorporation or these By-laws, the chairman of the meeting shall have the
power and duty to determine whether a nomination or any business proposed to be
brought before the meeting was made or proposed, as the case may be, in
accordance with the procedures set forth in this Section 2.7 and, if any
proposed nomination or business is not in compliance with this Section 2.7, to
declare that such defective proposal or nomination shall be disregarded.

      (2) For purposes of this Section 2.7, "public announcement" shall mean
disclosure in a press release reported by the Dow Jones News Service, Associated
Press or a comparable national news service or in a document publicly filed by
the Corporation with the Securities and Exchange Commission pursuant to Section
13, 14 or 15(d) of the Exchange Act.

      (3) Notwithstanding the foregoing provisions of this Section 2.7, a
stockholder shall also comply with all applicable requirements of the Exchange
Act and the rules and regulations thereunder with respect to the matters set
forth in this by-law. Nothing in this Section 2.7 shall be deemed to affect any
rights (i) of stockholders to request inclusion of proposals in the
Corporation's proxy statement pursuant to Rule 14a-8 under the Exchange Act or
(ii) of the holders of any series of Preferred Stock to elect directors under
specified circumstances.

      Section 2.8. Procedure for Election of Directors; Required Vote. Election
of directors at all meetings of the stockholders at which directors are to be
elected shall be by ballot, and, subject to the rights of the holders of any
series of Preferred Stock to elect directors under specified circumstances, a
plurality of the votes cast thereat shall elect directors. Except as otherwise
provided by law, the Certificate of Incorporation, or these By-laws, in all
matters other than the election of directors, the affirmative vote of a majority
of the shares present in person or represented by proxy at the meeting and
entitled to vote on the matter shall be the act of the stockholders.

      Section 2.9. Inspectors of Elections; Opening and Closing the Polls. The
Board of Directors by resolution shall appoint one or more inspectors, which
inspector or inspectors may include individuals who serve the Corporation in
other capacities, including, without limitation, as officers, employees, agents
or representatives, to act at meetings of stockholders and make written reports
thereof. One or more persons may be designated as alternate inspectors to
replace any inspector who fails to act. If no inspector or alternate has been
appointed to act or is able to act at a meeting of stockholders, the chairman of
the meeting shall appoint one or more inspectors to act at the meeting. Each
inspector, before discharging his or her duties, shall take and sign an oath
faithfully to execute


                                      -5-



the duties of inspector with strict impartiality and according to the best
of his or her ability. The inspectors shall have the duties prescribed by law.

      The chairman of the meeting shall fix and announce at the meeting the date
and time of the opening and the closing of the polls for each matter upon which
the stockholders will vote at a meeting.

                                   ARTICLE III

                               BOARD OF DIRECTORS

      Section 3.1. General Powers. The business and affairs of the Corporation
shall be managed under the direction of the Board of Directors. In addition to
the powers and authorities by these By-laws expressly conferred upon them, the
Board of Directors may exercise all such powers of the Corporation and do all
such lawful acts and things as are not by statute or by the Certificate of
Incorporation or by these By-laws required to be exercised or done by the
stockholders.

      Section 3.2. Number, Tenure and Qualifications. Subject to the rights of
the holders of any series of Preferred Stock to elect directors under specified
circumstances, the number of directors shall be fixed from time to time
exclusively pursuant to a resolution adopted by a majority of the Whole Board.
The directors, other than those who may be elected by the holders of any series
of Preferred Stock under specified circumstances, shall be divided, with respect
to the time for which they severally hold office, into three classes, as nearly
equal in number as is reasonably possible, designated Class I, Class II and
Class III, with the initial term of office of the Class I directors to expire at
the 1999 annual meeting of stockholders, the initial term of office of the Class
II directors to expire at the 2000 annual meeting of stockholders and the
initial term of office of the Class III directors to expire at the 2001 annual
meeting of stockholders, with each director to hold office until his or her
successor shall have been duly elected and qualified. No person shall be
nominated for election as a director if such person will have attained the age
of 70 prior to the expiration of his or her term of office, except for any
person whose election as a director of the Corporation is effective upon the
distribution of shares of the Corporation's common stock by a Delaware
corporation formerly named "W. R. Grace & Co." and whose initial term of office
is scheduled to expire at the 2001 annual meeting of stockholders. At each
annual meeting of stockholders, commencing with the 1999 annual meeting,
directors elected to succeed those directors whose terms then expire shall be
elected for a term of office to expire at the third succeeding annual meeting of
stockholders after their election, with each director to hold office until his
or her successor shall have been


                                      -6-



duly elected and qualified.

      Section 3.3. Regular Meetings. A regular meeting of the Board of Directors
shall be held without other notice than this Section 3.3 immediately after, and
at the same place as, the Annual Meeting of Stockholders. The Board of Directors
may fix the time and place for the holding of additional regular meetings
without notice.

      Section 3.4. Special Meetings. Special meetings of the Board of Directors
shall be called at the request of the Chairman, the President or a majority of
the directors then in office. The person or persons authorized to call special
meetings of the Board of Directors may fix the place and time of such meetings.

      Section 3.5. Notice. Notice of any special meeting or notice of a change
in the time or place of any regular meeting of the Board of Directors shall be
given to each director at his or her business or residence in writing by hand
delivery, first-class or overnight mail or courier service, telegram or
facsimile transmission, or orally by telephone. If mailed by first-class mail,
such notice shall be deemed adequately delivered when deposited in the U.S.
mails so addressed, with postage thereon prepaid, at least five (5) days before
such meeting. If by telegram, overnight mail or courier service, such notice
shall be deemed adequately delivered when the telegram is delivered to the
telegraph company or the notice is delivered to the overnight mail or courier
service company at least twenty-four (24) hours before such meeting. If by
facsimile transmission, such notice shall be deemed adequately delivered when
the notice is transmitted at least twelve (12) hours before such meeting. If by
telephone, the notice shall be communicated to the director or his or her
representative or answering machine. If by telephone or by hand delivery, the
notice shall be given at least twenty-four (24) hours prior to the time set for
the meeting. Neither the business to be transacted at, nor the purpose of, any
regular or special meeting of the Board of Directors need be specified in the
notice of such meeting, except for amendments to these By-laws, as provided
under Section 8.1. A meeting may be held at any time without notice if all the
directors are present or if those not present waive notice of the meeting in
accordance with Section 6.4 of these By-laws.

      Section 3.6. Action by Consent of Board of Directors. Any action required
or permitted to be taken at any meeting of the Board of Directors or of any
committee thereof may be taken without a meeting if all members of the Board of
Directors or committee, as the case may be, consent thereto in writing, and the
writing or writings are filed with the minutes of proceedings of the Board of
Directors or committee.

      Section  3.7.  Conference  Telephone  Meetings.  Members of the Board
of


                                      -7-



Directors, or any committee thereof, may participate in a meeting of the
Board of Directors or such committee by means of conference telephone or similar
communications equipment by means of which all persons participating in the
meeting can hear each other, and such participation in a meeting shall
constitute presence in person at such meeting.

      Section 3.8. Quorum. Subject to Section 3.9, a number of directors equal
to at least a majority of the Whole Board shall constitute a quorum for the
transaction of business. If at any meeting of the Board of Directors there shall
be less than a quorum present, a majority of the directors present may adjourn
the meeting from time to time without further notice. The act of the majority of
the directors present at a meeting at which a quorum is present shall be the act
of the Board of Directors. The directors present at a duly organized meeting may
continue to transact business until adjournment, notwithstanding the withdrawal
of enough directors to leave less than a quorum.

      Section 3.9. Vacancies. Subject to applicable law and the rights of the
holders of any series of Preferred Stock with respect to such series of
Preferred Stock, and unless the Board of Directors otherwise determines,
vacancies resulting from death, resignation, retirement, disqualification,
removal from office or other cause, and newly created directorships resulting
from any increase in the authorized number of directors, may be filled only by
the affirmative vote of a majority of the remaining directors, though less than
a quorum of the Board of Directors, and directors so chosen shall hold office
for a term expiring at the annual meeting of stockholders at which the term of
office of the class to which they have been elected expires and until such
director's successor shall have been duly elected and qualified. No decrease in
the number of authorized directors constituting the Whole Board shall shorten
the term of any incumbent director.

      Section 3.10. Committees. The Board of Directors may establish one or more
committees. Each Committee shall consist of two or more directors of the
Corporation designated by the Board of Directors. The Board of Directors may
designate one or more directors as alternate members of any committee, who may
replace any absent or disqualified member at any meeting of the committee. Any
such committee may to the extent permitted by law exercise such powers and shall
have such responsibilities as shall be specified in the designating resolution.
In the absence or disqualification of any member of such committee or
committees, the member or members thereof present at any meeting and not
disqualified from voting, whether or not constituting a quorum, may unanimously
appoint another member of the Board of Directors to act at the meeting in the
place of any such absent or disqualified member. Each committee shall keep
written minutes of its proceedings and shall report such proceedings to the
Board of Directors when


                                      -8-



requested.

      A majority of any committee may determine its action and fix the time and
place of its meetings, unless the Board of Directors shall otherwise provide.
Notice of such meetings shall be given to each member of the committee in the
manner provided for in Section 3.5 of these By-laws. The Board of Directors
shall have the power at any time to fill vacancies in, to change the membership
of, or to dissolve any such committee. Nothing herein shall be deemed to prevent
the Board of Directors from appointing one or more committees consisting in
whole or in part of persons who are not directors of the Corporation; provided,
however, that no such committee shall have or may exercise any authority of the
Board of Directors.

      The term of office of a committee member shall be as provided in the
resolution of the Board designating him or her but shall not exceed his or her
term as a director. If prior to the end of his term, a committee member should
cease to be a director, he or she shall cease to be a committee member. Any
member of a committee may resign at any time by giving written notice to the
Board of Directors, the Chairman, the President or the Secretary. Such
resignation shall take effect as provided in Section 6.6 of these By-laws in the
case of resignations by directors. Any member of a committee may be removed from
such committee, either with or without cause, at any time, by resolution adopted
by a majority of the whole Board. Any vacancy in a committee shall be filled by
the Board of Directors in the manner prescribed by these By-laws for the
original designation of the members of such committee.

      Section 3.11. Committee on Officers' Compensation. Pursuant to Section
3.10 of these By-laws, the Board of Directors shall designate a committee to
evaluate the performance of, and to recommend the appropriate level of
compensation for, officers of the Corporation. Such committee shall have access
to an advisor not otherwise serving the Corporation. Each member of such
committee shall be an "independent director," as that term is defined in the
following sentence. For purposes of this Section 3.11, an "independent director"
shall mean a person who (a) has not been employed by the Corporation within the
past five years; (b) is not, and is not affiliated with, a firm that is an
advisor or consultant to the Corporation; (c) is not affiliated with any
customer or supplier of the Corporation whose purchases from and/or sales to the
Corporation exceed 3% of the sales and revenues of such customer or supplier for
its most recently completed fiscal year; (d) has no personal services contract
with the Corporation; (e) is not affiliated with a tax-exempt entity, not
otherwise affiliated with the Corporation, that receives contributions from the
Corporation that exceed 3% of such entity's gross contributions for its most
recently completed fiscal year; and (f) is not a member of the "immediate
family" (as defined in Item 404(a) of Securities and Exchange


                                      -9-



Commission Regulation S-K) of any person described in clauses (a) through
(e).

      Section 3.12. Removal. Subject to the rights of the holders of any series
of Preferred Stock with respect to such series of Preferred Stock, any director,
or the entire Board of Directors, may be removed from office at any time by the
stockholders, but only for cause.

      Section 3.13. Records. The Board of Directors shall cause to be kept a
record containing the minutes of the proceedings of the meetings of the Board of
Directors and of the stockholders, appropriate stock books and registers and
such books of records and accounts as may be necessary for the proper conduct of
the business of the Corporation.

                                   ARTICLE IV

                                    OFFICERS

      Section 4.1. Elected Officers. The elected officers of the Corporation
shall be a Chairman, a President, a Secretary, a Treasurer, and such other
officers (including, without limitation, a Chief Financial Officer) as the Board
of Directors may deem proper from time to time. The Chairman shall be chosen
from among the directors. Each officer elected by the Board of Directors shall
have such powers and duties as generally pertain to his or her respective
office, subject to the specific provisions of this ARTICLE IV. Such officers
shall also have such powers and duties as may be conferred from time to time by
the Board of Directors. The Board of Directors may from time to time elect, or
the Chairman or President may appoint, such assistant officers (including one or
more Assistant Vice Presidents, Assistant Secretaries, Assistant Treasurers and
Assistant Controllers) as may be necessary or desirable for the conduct of the
business of the Corporation. Such assistant officers shall have such duties and
shall hold their offices for such terms as shall be provided in these By-laws or
as may be prescribed by the Board of Directors or by the Chairman or President,
as the case may be.

      Section 4.2. Election and Term of Office. The elected officers of the
Corporation shall be elected annually by the Board of Directors at the regular
meeting of the Board of Directors held after the annual meeting of the
stockholders or at any other time as the Board of Directors may deem proper.
Each officer shall hold office until his successor shall have been duly elected
and shall have qualified or until his death or until he shall resign, but any
officer may be removed from office at any time by the affirmative vote of a
majority of the Whole Board or, except in the case of an officer elected by the
Board of Directors, by the Chairman or President.


                                      -10-



      Such removal shall be without prejudice to the contractual rights, if any,
of the person so removed.

      Section 4.3. Chairman. The Chairman shall preside at all meetings of the
stockholders and of the Board of Directors and shall be the Chief Executive
Officer of the Company. The Chairman shall be responsible for the general
management of the affairs of the Corporation and shall perform all duties
incidental to his office which may be required by law and all such other duties
as are properly required of him by the Board of Directors. He shall make reports
to the Board of Directors and the stockholders, and shall see that all orders
and resolutions of the Board of Directors and of any committee thereof are
carried into effect. The Chairman may also serve as President, if so elected by
the Board of Directors.

      Section 4.4. President. The President shall act in a general executive
capacity and shall assist the Chairman in the administration and operation of
the Corporation's business and the general supervision of its policies and
affairs. In the absence of or the inability to act of the Chairman, the
President shall perform all duties of the Chairman and preside at all meetings
of stockholders and of the Board of Directors.

      Section 4.5. Vice  Presidents.  Each Vice  President  shall have such
powers and shall  perform  such  duties as shall be  assigned to him by the
Board of Directors.

      Section 4.6. Chief Financial Officer. The Chief Financial Officer (if any)
shall be a Vice President and act in an executive financial capacity. He shall
assist the Chairman and the President in the general supervision of the
Corporation's financial policies and affairs.

      Section 4.7. Treasurer. The Treasurer shall exercise general supervision
over the receipt, custody and disbursement of corporate funds. The Treasurer
shall cause the funds of the Corporation to be deposited in such banks as may be
authorized by the Board of Directors, or in such banks as may be designated as
depositaries in the manner provided by resolution of the Board of Directors. He
shall have such further powers and duties and shall be subject to such
directions as may be granted or imposed upon him from time to time by the Board
of Directors, the Chairman or the President.

      Section 4.8. Secretary. The Secretary shall keep or cause to be kept in
one or more books provided for that purpose, the minutes of all meetings of the
Board of Directors, the committees of the Board of Directors and the
stockholders; he shall see that all notices are duly given in accordance with
the provisions of these By-laws and as required by law; he shall be custodian of
the records and the seal of


                                      -11-



the Corporation and affix and attest the seal to all stock certificates of
the Corporation (unless the seal of the Corporation on such certificates shall
be a facsimile, as hereinafter provided) and affix and attest the seal to all
other documents to be executed on behalf of the Corporation under its seal; and
he shall see that the books, reports, statements, certificates and other
documents and records required by law to be kept and filed are properly kept and
filed; and in general, he shall perform all the duties incident to the office of
Secretary and such other duties as from time to time may be assigned to him by
the Board of Directors, the Chairman or the President.

      Section 4.9. Controller. The Controller shall have general control, charge
and supervision of the accounts of the Corporation. He shall see that proper
accounts are maintained and that all accounts are properly credited from time to
time. He shall prepare or cause to be prepared the financial statements of the
Corporation.

      Section 4.10. Removal. Any officer elected by the Board of Directors may
be removed by the affirmative vote of a majority of the Whole Board whenever, in
their judgment, the best interests of the Corporation would be served thereby.
Any assistant officer appointed by the Chairman or the President may be removed
by him whenever, in his judgment, the best interests of the Corporation would be
served thereby. No elected officer shall have any contractual rights against the
Corporation for compensation by virtue of such election beyond the date of the
election of his successor, his death, his resignation or his removal, whichever
event shall first occur, except as otherwise provided in an employment contract
or under an employee deferred compensation plan.

      Section 4.11. Vacancies. A newly created elected office and a vacancy in
any elected office because of death, resignation, or removal may be filled by
the Board of Directors for the unexpired portion of the term at any meeting of
the Board of Directors.


                                      -12-



                                    ARTICLE V

                        STOCK CERTIFICATES AND TRANSFERS

      Section 5.1. Stock Certificates and Transfers. The interest of each
stockholder of the Corporation shall be evidenced by certificates for shares of
stock in such form as the appropriate officers of the Corporation may from time
to time prescribe. The shares of the stock of the Corporation shall be
transferred on the books of the Corporation by the holder thereof in person or
by his attorney, upon surrender for cancellation of certificates for at least
the same number of shares, with an assignment and power of transfer endorsed
thereon or attached thereto, duly executed, with such proof of the authenticity
of the signature as the Corporation or its agents may reasonably require.

      The certificates of stock shall be signed, countersigned and registered in
such manner as the Board of Directors may by resolution prescribe, which
resolution may permit all or any of the signatures on such certificates to be in
facsimile. In case any officer, transfer agent or registrar who has signed or
whose facsimile signature has been placed upon a certificate has ceased to be
such officer, transfer agent or registrar before such certificate is issued, it
may be issued by the Corporation with the same effect as if he were such
officer, transfer agent or registrar at the date of issue.

      Section 5.2. Lost, Stolen or Destroyed Certificates. No certificate for
shares of stock in the Corporation shall be issued in place of any certificate
alleged to have been lost, destroyed or stolen, except on production of such
evidence of such loss, destruction or theft and on delivery to the Corporation
of a bond of indemnity in such amount, upon such terms and secured by such
surety, as the Board of Directors or any financial officer may in its or his
discretion require.

                                   ARTICLE VI

                            MISCELLANEOUS PROVISIONS

      Section  6.1.  Fiscal  Year.  The  fiscal  year  of  the  Corporation
shall  begin on the first day of January  and end on the  thirty-first  day
of December of each year.

      Section 6.2. Dividends. The Board of Directors may from time to time
declare, and the Corporation may pay, dividends on its outstanding shares in the
manner and upon the terms and conditions provided by law and the Certificate of
Incorporation.


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      Section  6.3.   Seal.   The  corporate   seal  shall  have  enscribed
thereon the words "Corporate  Seal," the year of  incorporation  and around
the margin thereof the words "W. R. Grace & Co."

      Section 6.4. Waiver of Notice. Whenever any notice is required to be given
to any stockholder or director of the Corporation under the provisions of the
General Corporation Law of the State of Delaware (the "GCL") or these By-laws, a
waiver thereof in writing, signed by the person or persons entitled to such
notice, whether before or after the time stated therein, shall be deemed
equivalent to the giving of such notice. The attendance of any stockholder at a
meeting in person or by proxy, without protesting at the beginning of the
meeting the lack of notice of such meeting, shall constitute a waiver of notice
of such stockholder. Neither the business to be transacted at, nor the purpose
of, any annual or special meeting of the stockholders or the Board of Directors
or committee thereof need be specified in any waiver of notice of such meeting.

      Section 6.5. Audits. The accounts, books and records of the Corporation
shall be audited upon the conclusion of each fiscal year by an independent
certified public accountant selected by the Board of Directors, and it shall be
the duty of the Board of Directors to cause such audit to be done annually.

      Section 6.6. Resignations. Any director or any officer or assistant
officer, whether elected or appointed, may resign at any time by giving written
notice of such resignation to the Chairman, the President, or the Secretary, and
such resignation shall be deemed to be effective as of the close of business on
the date said notice is received by the Chairman, the President, or the
Secretary, or at such later time as is specified therein. No formal action shall
be required of the Board of Directors or the stockholders to make any such
resignation effective.

      Section 6.7. Indemnification and Insurance. (A) Each person who was or is
made a party or is threatened to be made a party to or is involved in any
action, suit, or proceeding, whether civil, criminal, administrative or
investigative (hereinafter, a "proceeding"), by reason of the fact that he or
she or a person of whom he or she is the legal representative is or was a
director or officer of the Corporation or is or was serving at the request of
the Corporation as a director, officer, employee or agent of another corporation
or of a partnership, joint venture, trust or other enterprise, including service
with respect to employee benefit plans maintained or sponsored by the
Corporation, whether the basis of such proceeding is alleged action in an
official capacity as a director, officer, employee or agent or in any other
capacity while serving as a director, officer, employee or agent, shall be
indemnified and held harmless by the Corporation to the fullest extent
authorized by the GCL as the same exists or may hereafter be amended (but, in
the case of any


                                      -14-



such amendment, only to the extent that such amendment permits the
Corporation to provide broader indemnification rights than said law permitted
the Corporation to provide prior to such amendment), against all expense,
liability and loss (including attorneys' fees, judgments, fines, ERISA excise
taxes or penalties and amounts paid or to be paid in settlement) reasonably
incurred or suffered by such person in connection therewith, and such
indemnification shall continue as to a person who has ceased to be a director,
officer, employee or agent and shall inure to the benefit of his or her heirs,
executors and administrators; provided, however, that except as provided in
paragraph (C) of this Section 6.7, the Corporation shall indemnify any such
person seeking indemnification in connection with a proceeding (or part thereof)
initiated by such person only if such proceeding (or part thereof) was
authorized by the Board of Directors. The right to indemnification conferred in
this Section 6.7 shall be a contract right and shall include the right to be
paid by the Corporation the expenses incurred in defending any such proceeding
in advance of its final disposition, such advances to be paid by the Corporation
within 20 days after the receipt by the Corporation of a statement or statements
from the claimant requesting such advance or advances from time to time;
provided, however, that if the GCL requires, the payment of such expenses
incurred by a director or officer in his or her capacity as a director or
officer (and not in any other capacity in which service was or is rendered by
such person while a director or officer, including, without limitation, service
to an employee benefit plan) in advance of the final disposition of a
proceeding, shall be made only upon delivery to the Corporation of an
undertaking by or on behalf of such director or officer, to repay all amounts so
advanced if it shall ultimately be determined that such director or officer is
not entitled to be indemnified under this Section 6.7 or otherwise.

      (B) To obtain indemnification under this Section 6.7, a claimant shall
submit to the Corporation a written request, including therein or therewith such
documentation and information as is reasonably available to the claimant and is
reasonably necessary to determine whether and to what extent the claimant is
entitled to indemnification. Upon written request by a claimant for
indemnification pursuant to the first sentence of this paragraph (B), a
determination, if required by applicable law, with respect to the claimant's
entitlement thereto shall be made as follows: (1) if requested by the claimant,
by Independent Counsel (as hereinafter defined), or (2) if no request is made by
the claimant for a determination by Independent Counsel, (i) by the Board of
Directors by a majority vote of a quorum consisting of Disinterested Directors
(as hereinafter defined), or (ii) if a quorum of the Board of Directors
consisting of Disinterested Directors is not obtainable or, even if obtainable,
such quorum of Disinterested Directors so directs, by Independent Counsel in a
written opinion to the Board of Directors, a copy of which shall be delivered to
the claimant, or (iii) if a quorum of Disinterested Directors so directs, by the
stockholders of the Corporation. In the event the determination of


                                      -15-



entitlement to indemnification is to be made by Independent Counsel at the
request of the claimant, the Independent Counsel shall be selected by the Board
of Directors unless there shall have occurred within two years prior to the date
of the commencement of the action, suit or proceeding for which indemnification
is claimed a "Change of Control" (as defined below) in which case the
Independent Counsel shall be selected by the claimant unless the claimant shall
request that such selection be made by the Board of Directors. If it is so
determined that the claimant is entitled to indemnification, payment to the
claimant shall be made within 10 days after such determination.

      (C) If a claim under paragraph (A) of this Section 6.7 is not paid in full
by the Corporation within 30 days after a written claim pursuant to paragraph
(B) of this Section 6.7 has been received by the Corporation, the claimant may
at any time thereafter bring suit against the Corporation to recover the unpaid
amount of the claim and, if successful in whole or in part, the claimant shall
be entitled to be paid also the expense of prosecuting such claim. It shall be a
defense to any such action (other than an action brought to enforce a claim for
expenses incurred in defending any proceeding in advance of its final
disposition where the required undertaking, if any is required, has been
tendered to the Corporation) that the claimant has not met the standard of
conduct which makes it permissible under the GCL for the Corporation to
indemnify the claimant for the amount claimed, but the burden of proving such
defense shall be on the Corporation. Neither the failure of the Corporation
(including its Board of Directors, Independent Counsel or stockholders) to have
made a determination prior to the commencement of such action that
indemnification of the claimant is proper in the circumstances because he or she
has met the applicable standard of conduct set forth in the GCL, nor an actual
determination by the Corporation (including its Board of Directors, Independent
Counsel or stockholders) that the claimant has not met such applicable standard
of conduct, shall be a defense to the action or create a presumption that the
claimant has not met the applicable standard of conduct.

      (D) If a determination shall have been made pursuant to paragraph (B) of
this Section 6.7 that the claimant is entitled to indemnification, the
Corporation shall be bound by such determination in any judicial proceeding
commenced pursuant to paragraph (C) of this Section 6.7.

      (E) The Corporation shall be precluded from asserting in any judicial
proceeding commenced pursuant to paragraph (C) of this Section 6.7 that the
procedures and presumptions of this Section 6.7 are not valid, binding and
enforceable and shall stipulate in such proceeding that the Corporation is bound
by all the provisions of this Section 6.7.


                                      -16-



      (F) The right to indemnification and the payment of expenses incurred in
defending a proceeding in advance of its final disposition conferred in this
Section 6.7 shall not be exclusive of any other right which any person may have
or hereafter acquire under any statute, provision of the Certificate of
Incorporation, these By-laws, agreement, vote of stockholders or Disinterested
Directors or otherwise. No repeal or modification of this Section 6.7 shall in
any way diminish or adversely affect the rights of any director, officer,
employee or agent of the Corporation hereunder in respect of any occurrence or
matter arising prior to any such repeal or modification.

      (G) The Corporation may maintain insurance, at its expense, to protect
itself and any director, officer, employee or agent of the Corporation or
another corporation, partnership, joint venture, trust or other enterprise
against any expense, liability or loss, whether or not the Corporation would
have the power to indemnify such person against such expense, liability or loss
under the GCL. To the extent that the Corporation maintains any policy or
policies providing such insurance, each such director or officer, and each such
agent or employee to which rights to indemnification have been granted as
provided in paragraph (H) of this Section 6.7, shall be covered by such policy
or policies in accordance with its or their terms to the maximum extent of the
coverage thereunder for any such director, officer, employee or agent.

      (H) The Corporation may, to the extent authorized from time to time by the
Board of Directors, grant rights to indemnification, and rights to be paid by
the Corporation the expenses incurred in defending any proceeding in advance of
its final disposition, to any employee or agent of the Corporation to the
fullest extent of the provisions of this Section 6.7 with respect to the
indemnification and advancement of expenses of directors and officers of the
Corporation.

      (I) If any provision or provisions of this Section 6.7 shall be held to be
invalid, illegal or unenforceable for any reason whatsoever: (1) the validity,
legality and enforceability of the remaining provisions of this Section 6.7
(including, without limitation, each portion of any paragraph of this By-law
containing any such provision held to be invalid, illegal or unenforceable, that
is not itself held to be invalid, illegal or unenforceable) shall not in any way
be affected or impaired thereby; and (2) to the fullest extent possible, the
provisions of this Section 6.7 (including, without limitation, each such portion
of any paragraph of this By-law containing any such provision held to be
invalid, illegal or unenforceable) shall be construed so as to give effect to
the intent manifested by the provision held invalid, illegal or unenforceable.

      (J) For purposes of this Section 6.7:


                                      -17-



            (1) "Disinterested Director" means a director of the Corporation who
      is not and was not a party to the matter in respect of which
      indemnification is sought by the claimant.

            (2) "Independent Counsel" means a law firm, a member of a law firm,
      or an independent practitioner, that is experienced in matters of
      corporation law and shall include any person who, under the applicable
      standards of professional conduct then prevailing, would not have a
      conflict of interest in representing either the Corporation or the
      claimant in an action to determine the claimant's rights under this
      Section 6.7.

            (3) "Change of Control" has the meaning given such term in the
      Corporation's 1998 Stock Incentive Plan, as the same may be amended or
      superseded from time to time.

      (K) Any notice, request or other communication required or permitted to be
given to the Corporation under this Section 6.7 shall be in writing and either
delivered in person or sent by telecopy, telex, telegram, overnight mail or
courier service, or certified or registered mail, postage prepaid, return
receipt requested, to the Secretary of the Corporation and shall be effective
only upon receipt by the Secretary.

                                   ARTICLE VII

                            CONTRACTS, PROXIES, ETC.

      Section 7.1. Contracts. Except as otherwise required by law, the
Certificate of Incorporation or these By-laws, any contracts or other
instruments may be executed and delivered in the name and on the behalf of the
Corporation by such officer or officers of the Corporation as the Board of
Directors may from time to time direct. Such authority may be general or
confined to specific instances as the Board of Directors may determine. The
Chairman, the President or any Vice President may execute bonds, contracts,
deeds, leases and other instruments to be made or executed for or on behalf of
the Corporation. Subject to any restrictions imposed by the Board of Directors
or the Chairman, the President or any Vice President of the Corporation may
delegate contractual powers to others under his jurisdiction, it being
understood, however, that any such delegation of power shall not relieve such
officer of responsibility with respect to the exercise of such delegated power.

      Section  7.2.  Proxies.   Unless  otherwise  provided  by  resolution
adopted by the Board of  Directors,  the  Chairman,  the  President  or any
Vice President may from


                                      -18-



time to time appoint an attorney or attorneys or agent or agents of the
Corporation, in the name and on behalf of the Corporation, to cast the votes
which the Corporation may be entitled to cast as the holder of stock or other
securities in any other corporation, any of whose stock or other securities may
be held by the Corporation, at meetings of the holders of the stock or other
securities of such other corporation, or to consent in writing, in the name of
the Corporation as such holder, to any action by such other corporation, and may
instruct the person or persons so appointed as to the manner of casting such
votes or giving such consent, and may execute or cause to be executed in the
name and on behalf of the Corporation and under its corporate seal or otherwise,
all such written proxies or other instruments as he may deem necessary or proper
in the premises.

                                  ARTICLE VIII

                                   AMENDMENTS

      Section 8.1. Amendments. These By-laws may be altered, amended, or
repealed at any meeting of the Board of Directors or of the stockholders,
provided notice of the proposed change was given in the notice of the meeting
and, in the case of a meeting of the Board of Directors, in a notice given not
less than two days prior to the meeting; provided, however, that, in the case of
amendments by stockholders, notwithstanding any other provisions of these
By-laws or any provision of law which might otherwise permit a lesser vote or no
vote, but in addition to any affirmative vote of the holders of any particular
class or series of the capital stock of the Corporation required by law, the
Certificate of Incorporation or these By-laws, the affirmative vote of the
holders of at least 80 percent of the voting power of all the then outstanding
shares of the Voting Stock, voting together as a single class, shall be required
to alter, amend or repeal any provision of these By-laws.


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