[Munger, Tolles & Olson LLP]
                                       
                                       
                                       
                                April 22, 1998




BT ALEX. BROWN INCORPORATED
130 Liberty Street
New York, New York 10006

     Re:  Henry Company 10% Senior Notes Due 2008

Ladies and Gentlemen:

          We have acted as counsel for Henry Company, a California 
corporation (the "Company"), with respect to the issuance and sale by the 
Company to BT Alex. Brown Incorporated (the "Initial Purchaser") of 
$85,000,000 principal amount of the Company's 10% Senior Notes due 2008 (the 
"Notes"), pursuant to that certain Purchase Agreement (the "Purchase 
Agreement") dated as of April 15, 1998, between the Initial Purchaser, the 
Company and, as of April 22, 1998, Monsey Products, Co., a Pennsylvania 
corporation ("Monsey"), Kimberton Enterprises, Inc., a Delaware corporation 
("Kimberton") and Monsey Products of Arizona LLC, an Arizona limited 
liability company ("Monsey Arizona"; Monsey, Kimberton and Monsey Arizona are 
together sometimes referred to herein as the "Guarantors") as guarantors.  
The Notes are being issued pursuant to an Indenture dated as of April 22, 
1998 (the "Indenture"), between the Company, U.S. Trust Company of 
California, N.A., as trustee (the "Trustee") and the Guarantors.  All 
capitalized terms used herein without definition shall have meanings ascribed 
to such terms in the Purchase Agreement.

          In our capacity as counsel for the Company, we have examined 
originals or copies of corporate records of the Company, certificates of 
public officials and of officers of the Company and others, and such other 
documents as we have deemed necessary or 



BT Alex. Brown Incorporated
April 22, 1998
Page 2

appropriate for the purposes of this opinion.  We have also examined the 
Offering Memorandum dated April 15, 1998 related to the offer by the Company 
of the Senior Notes (the "Final Memorandum").  In our examination, we have 
assumed the genuineness of all signatures, the authenticity of all documents 
submitted to us as originals, the conformity to authentic original documents 
of all documents submitted to us as copies, and the legal capacity of all 
parties executing such documents.

          In making our examination of documents executed by parties other 
than the Company, we have assumed that such parties had the power, corporate 
or other, to enter into and perform all obligations thereunder and have also 
assumed the due authorization by all requisite action, corporate or other, 
and execution and delivery by such parties of such documents and the validity 
and binding effect thereof.

          On the basis of the foregoing, and in reliance thereon, and subject 
to the assumptions, qualifications, and limitations set forth herein, we are 
of the opinion that:

          1.   The Company is duly incorporated, validly existing and in good 
standing under the laws of the State of California and has all requisite 
corporate power and authority to own its properties and to conduct its 
business as described in the Final Memorandum.  The Company is duly qualified 
to do business as a foreign corporation in good standing in the jurisdictions 
listed in Exhibit A hereto.

          2.   The Company has the authorized, issued and outstanding 
capitalization set forth in the Final Memorandum; all of the outstanding 
shares of capital stock of the Company have been duly authorized and validly 
issued, are fully paid and nonassessable and, to our knowledge, were not 
issued in violation of any preemptive or similar rights.

          3.   To our knowledge, except as set forth in the Final Memorandum, 
(A) no options, warrants or other rights to purchase from the Company shares 
of capital stock of the Company are outstanding, (B) no agreements or other 
obligations to issue, or other rights to convert, any obligation into, or 
exchange any securities for, shares of capital stock in the Company are 
outstanding, and (C) no holder of securities of the Company, other than the 
holders of the Notes, is entitled to have such securities registered under a 
registration statement to be filed pursuant to the Registration Rights 
Agreement dated as of April 22, 1998 by and among the Company, the Initial 
Purchaser and the Guarantors (the "Registration Rights Agreement").

          4.   The Company has all requisite corporate power and authority to 
execute, deliver and perform each of its obligations under the Indenture, the 
Notes, the Exchange Notes and the Private Exchange Notes; the Indenture meets 
the requirements for qualification under 



BT Alex. Brown Incorporated
April 22, 1998
Page 3

the TIA; the Indenture has been duly and validly authorized by the Company 
and, when duly executed and delivered by the Company and each Guarantor 
(assuming the due authorization, execution and delivery thereof by the 
Trustee), will constitute the valid and legally binding agreement of the 
Company, enforceable against the Company in accordance with its terms, except 
that (A) the enforcement thereof may be subject to (i) bankruptcy, 
insolvency, reorganization, moratorium or other similar laws now or hereafter 
in effect relating to creditors' rights generally and (ii) general principles 
of equity and the discretion of the court before which any proceeding 
therefor may be brought and (B) we express no opinion with respect to the 
enforceability or effect of Section 4.09 of the Indenture or as to whether a 
California court or a Federal court sitting in California would uphold the 
stipulation in the Indenture that New York law governs the Indenture and the 
Notes and the Guarantees (the Notes and the Guarantees, together, are 
referred to herein as the "Securities"). 

          5.   The Notes and the Guarantees are in the form contemplated by 
the Indenture.  The Notes have each been duly and validly authorized by the 
Company and, when duly executed and delivered by the Company and paid for by 
the Initial Purchaser in accordance with the terms of the Purchase Agreement 
(assuming the due authorization, execution and delivery of the Indenture by 
the Trustee and due authentication and delivery of the Notes by the Trustee 
in accordance with the Indenture), will constitute the valid and legally 
binding obligations of the Company, entitled to the benefits of the 
Indenture, and enforceable against the Company in accordance with their 
terms, except that the enforcement thereof may be subject to (A) bankruptcy, 
insolvency, reorganization, moratorium or other similar laws now or hereafter 
in effect relating to creditors' rights generally and (B) general principles 
of equity and the discretion of the court before which any proceeding 
therefor may be brought.

          6.   The Exchange Notes and the Private Exchange Notes have been 
duly and validly authorized by the Company, and if the Exchange Notes and the 
Private Exchange Notes have been duly executed and delivered by the Company 
in accordance with the terms of the Registration Rights Agreement and the 
Indenture (assuming the due authorization, execution and delivery of the 
Indenture by the Trustee and due authentication and delivery of the Exchange 
Notes and the Private Exchange Notes by the Trustee in accordance with the 
Indenture), will constitute the valid and legally binding obligations of the 
Company, entitled to the benefits of the Indenture, and enforceable against 
the Company in accordance with their terms, except that the enforcement 
thereof may be subject to (A) bankruptcy, insolvency, reorganization, 
moratorium or other similar laws now or hereafter in effect relating to 
creditors' rights generally and (B) general principles of equity and the 
discretion of the court before which any proceeding therefor may be brought.
          
          7.  The Company has all requisite corporate power and authority to 
execute, deliver and perform its obligations under the Registration Rights 
Agreement; the Registration 



BT Alex. Brown Incorporated
April 22, 1998
Page 4

Rights Agreement has been duly and validly authorized by the Company and, 
when duly executed and delivered by the Company and each of the Guarantors 
(assuming due authorization, execution and delivery thereof by the Initial 
Purchaser), will constitute the valid and legally binding agreement of the 
Company, enforceable against the Company in accordance with its terms, except 
that (A) the enforcement thereof may be subject to (i) bankruptcy, 
insolvency, reorganization, moratorium or other similar laws now or hereafter 
in effect relating to creditors' rights generally and (ii) general principles 
of equity and the discretion of the court before which any proceeding 
therefor may be brought, (B) any rights to indemnity or contribution 
thereunder may be limited by federal and state securities laws and public 
policy considerations, and (C) we express no opinion with respect to the 
enforceability or effect of Section 4 of the Registration Rights Agreement or 
that a California court or a Federal court sitting in California would uphold 
the stipulation in the Registration Rights Agreement that New York law would 
govern it.

          8.   The Company has all requisite corporate power and authority to 
execute, deliver and perform its obligations under the Purchase Agreement and 
to consummate the transactions contemplated thereby; the Purchase Agreement 
and the consummation by the Company of the transactions contemplated thereby 
have been duly and validly authorized by the Company.  The Purchase Agreement 
has been duly executed and delivered by the Company.

          9.   The descriptions of the Indenture, the Notes, the Guarantees, 
the Registration Rights Agreement, the New Credit Agreement and the 
Acquisition Agreement contained in the Final Memorandum provide a fair 
summary of such documents.

          10.  The statements set forth under the headings "The 
Transactions," "Certain Transactions," "Description of the Credit 
Facilities," and "Description of the Notes" in the Final Memorandum, insofar 
as such statements constitute a summary of provisions of documents referred 
to therein, accurately summarize the described provisions of such documents 
in all material respects.  The first and third sentences of the second 
paragraph and the first and second sentences of the third paragraph appearing 
under the heading "Business - Litigation" and the third sentence of the 
second paragraph appearing under the heading "Business -Environmental 
Matters," insofar as such sentences constitute a summary of provisions of 
documents referred to therein, accurately summarize the described provisions 
of such documents in all material respects; provided, that we express no 
opinion with respect to (i) the status of any such proceedings or matters, or 
the materiality thereof or (ii) the accuracy of any statement of fact 
contained therein as it relates to the actions of any person or entity.

          11.  The execution, delivery and performance by the Company of the 
Purchase Agreement, the Indenture, the Registration Rights Agreement, the 
Acquisition 



BT Alex. Brown Incorporated
April 22, 1998
Page 5

Agreement and the New Credit Agreement and the consummation of the 
transactions contemplated thereby (including, without limitation, the 
issuance and sale of the Notes to the Initial Purchaser) will not conflict 
with, constitute or result in a breach or a default under (or an event which 
with notice or passage of time or both would constitute a default under) or 
violation of any of (i) the terms or provisions of any contract listed on 
Exhibit B hereto, except for any such conflict, breach, violation, default or 
event which would not, individually or in the aggregate, have a material 
adverse effect on the business, condition (financial or otherwise), prospects 
or results of operations of the Company, the Guarantors and the Guarantors' 
direct and indirect subsidiaries taken as a whole (a "Material Adverse 
Effect"), (ii) the articles of incorporation or bylaws of the Company, or 
(iii) assuming compliance with all applicable state securities or "Blue Sky" 
laws and assuming the accuracy of the representations and warranties of the 
Initial Purchaser in Section 8 of the Purchase Agreement, any statute, law, 
judgment, decree, order, rule or regulation known to us to be applicable to 
the Company or any of its properties or assets, except for any such conflict, 
breach or violation which would not, individually or in the aggregate, have a 
Material Adverse Effect.

          12.  Assuming the accuracy of the Initial Purchaser's 
representations and warranties in Section 8 of the Purchase Agreement, no 
consent, approval, authorization or order of any governmental authority is 
required for the issuance and sale by the Company of the Notes to the Initial 
Purchaser or the consummation by the Company of the other transactions 
contemplated thereby, except such as may be required under state securities 
or "Blue Sky" laws, as to which we express no opinion, and those which have 
previously been obtained.

          13.  To our knowledge, there are no legal or governmental 
proceedings involving or affecting the Company or any of the Guarantors or 
any of their respective properties or assets which would be required to be 
described in a prospectus on Form S-1 pursuant to the Securities Act of 1933, 
as amended (the "Act") that are not described in the Final Memorandum, nor 
are there any material contracts which would be required to be described in a 
prospectus on Form S-1 pursuant to the Act that are not described in the 
Final Memorandum; provided, that with respect to our opinion as to the 
properties, assets or material contracts of the Guarantors, we have relied 
solely on an examination of the Guarantors' schedules to the Acquisition 
Agreement (for which we assume no responsibility and which we have not 
independently verified) describing legal or governmental proceedings and 
material contracts.

          14.  None of the Company or any of the Guarantors, or immediately 
after the sale of the Securities to be sold pursuant to the Purchase 
Agreement and the application of the proceeds from such sale (as described in 
the Final Memorandum under the caption "Sources and Uses of Funds") will be, 
an "investment company" as such term is defined in the 



BT Alex. Brown Incorporated
April 22, 1998
Page 6

Investment Company Act of 1940, as amended; provided, that with respect to 
the opinion set forth in this Paragraph 14, we have relied solely on the 
description of the businesses of the Company and the Guarantors contained in 
the Final Memorandum and a certificate of the chief financial officer of the 
Company as to the business and financial affairs of the Company and, to his 
knowledge, of the Guarantors.

          15.  No registration of the Securities is required under the Act in 
connection with the sale of the Securities to the Initial Purchaser as 
contemplated by the Purchase Agreement and the Final Memorandum or in 
connection with the initial resale of the Securities by the Initial Purchaser 
in accordance with the Purchase Agreement, and prior to the commencement of 
the Exchange Offer (as defined in the Registration Rights Agreement) or the 
effectiveness of the Shelf Registration Statement (as defined in the 
Registration Rights Agreement), the Indenture is not required to be qualified 
under the TIA, in each case assuming (i) (A) that the purchasers who buy such 
Securities in the initial resale thereof are qualified institutional buyers 
as defined in Rule 144A promulgated under the Act ("QIBs") or (B) that the 
offer or sale of the Securities is made in an offshore transaction as defined 
in Regulation S promulgated under the Act, (ii) the accuracy of the Initial 
Purchaser's representations in Section 8 of the Purchase Agreement and those 
of the Company and the Guarantors contained in the Purchase Agreement 
regarding the absence of a general solicitation in connection with the sale 
of such Securities to the Initial Purchaser and the initial resale thereof 
and (iii) the due performance by the Initial Purchaser of the agreements set 
forth in Section 8 of the Purchase Agreement.

          16.  Assuming that the proceeds from the sale of the Securities are 
applied as described in the Final Memorandum under the caption "Sources and 
Uses of Funds", neither the consummation of the transactions contemplated by 
the Purchase Agreement nor the sale, issuance, execution or delivery of the 
Securities by the Company and the Guarantors, as appropriate, will violate 
Regulations G, T, U or X of the Board of Governors of the Federal Reserve 
System.

                          -------------------------

          Because the primary purpose of our professional engagement was not 
to establish or confirm factual matters or financial, accounting or 
statistical information, and because many determinations involved in the 
Final Memorandum are of a wholly or partially non-legal character or relate 
to matters outside the scope of the opinion set forth above, we are not 
passing upon and do not assume any responsibility for the accuracy, 
completeness or fairness of the statements contained in the Final Memorandum, 
and we make no representation 



BT Alex. Brown Incorporated
April 22, 1998
Page 7

that we have independently verified the accuracy, completeness or fairness of 
such statements or any of them.

          However, during the course of our engagement, we have participated 
in conferences with officers and other representatives of the Company, 
representatives of the independent accountants of the Company, 
representatives of the Initial Purchaser and counsel for the Initial 
Purchaser at which conferences the contents of the Final Memorandum and 
related matters were discussed. Although we are not passing upon, and do not 
assume any responsibility for, the accuracy, completeness or fairness of the 
statements contained in the Final Memorandum (without limiting our opinions 
set forth in paragraphs 9 and 10 above) and have made no independent check or 
verification thereof, during the course of such participation (in which we 
relied as to materiality primarily on the statements of officers of the 
Company), no facts have come to our attention that have led us to believe 
that the Final Memorandum, as of its date or as of the date hereof, contained 
an untrue statement of a material fact or omitted to state any material fact 
required to be stated therein or necessary to make the statements therein, in 
light of the circumstances under which they were made, not misleading, except 
that we express no opinion or belief with respect to the financial statements 
and related notes thereto and the other financial, statistical and accounting 
data included in the Final Memorandum.

          We furthermore confirm to you that, to our knowledge, there are no 
legal or governmental proceedings pending or threatened to which the Company 
is a party or to which any of its properties or assets is subject which seeks 
to restrain, enjoin or prevent the consummation of or otherwise challenge the 
issuance or sale of the Notes to be sold pursuant to the Purchase Agreement 
or the consummation of the other transactions described in the Final 
Memorandum under the caption "Sources and Uses of Funds."

          We are admitted to practice law only in the State of California. 
Accordingly, our opinion is limited in all respects to the laws of the State 
of California, the Federal laws of the United States of America and the 
General Corporation Law of the State of Delaware, and we assume no 
responsibility as to the applicability or effect of the laws of any other 
jurisdiction.  To the extent that the matters which are the subject of this 
opinion may be affected by the laws of the State of New York, we have 
assumed, without verification, that the laws of the State of New York are 
identical to the laws of the State of California.  We express no opinion as 
to the effect of California or Federal laws relating to permissible rates of 
interest on the Securities and the transactions contemplated by the Purchase 
Agreement.

          This letter is furnished by us as counsel for the Company pursuant 
to Section 7(a) of the Purchase Agreement in connection with the offer and 
sale of the Securities and is intended to be solely for the benefit of the 
Initial Purchaser.  This letter may not be 



BT Alex. Brown Incorporated
April 22, 1998
Page 8

relied upon by the Initial Purchaser for any other purpose, or furnished to, 
quoted to, or relied upon by any other person or entity for any purpose, 
without our prior written consent.

                                   Very truly yours,

                                   /s/ MUNGER, TOLLES & OLSON LLP
                                   ------------------------------
                                   Munger, Tolles & Olson LLP



BT Alex. Brown Incorporated
April 22, 1998
Page 9
                                       
                                  EXHIBIT A
                            Foreign Jurisdictions
                                          
                                          
                                    Texas
                                  Washington
                                    Oregon



BT Alex. Brown Incorporated
April 22, 1998
Page 10

                                  EXHIBIT B
                                  Contracts
                                       


     1.   Warrant Agreement dated as of October 1, 1997 between Henry Company
          and the Warner W. Henry Living Trust

     2.   Financing and Security Agreement dated as of December 20, 1996 by and
          between Henry Company and NationsBank, N.A.



                                OFFICER'S CERTIFICATE
                            TO MUNGER, TOLLES & OLSON LLP


     The undersigned Jeffrey A. Wahba, Chief Financial Officer of Henry Company
(the "Company"), in connection with the legal opinion to be given by Munger,
Tolles & Olson LLP in connection with the issuance of the Company's 10% Senior
Notes Due 2008 (the "Notes"), does hereby certify as follows:

          1.   Except as described in the Offering Memorandum dated April 15,
     1998 relating to the issuance and sale of the Notes (the "Offering
     Memorandum"), the Company has not issued any shares of its capital stock.

          2.   Attached as Exhibit A hereto is a true and correct list of every
     material bond, debenture, note or other evidence of material indebtedness,
     and every material instrument, indenture, contract or agreement to which
     the Company is a party or by which any of its properties are bound.

          3.   There are no legal or governmental proceedings to which the
     Company is a party or of which any of its property is the subject, other
     than ordinary routine litigation incidental to the business of the Company,
     which could not be reasonably expected to have a material adverse effect on
     the operations, business or financial condition of the Company.

          4.   There are no court or administrative orders, writs, judgments or
     decrees specifically directed to the Company which are material to the
     Company.

          5.   The offer and sale of the Notes will be conducted in accordance
     with the terms set forth in the Purchase Agreement dated April 15, 1998 by
     and among the Company, BT Alex. Brown Incorporated (the "Initial
     Purchaser") and the guarantors named therein.

          6.   The financial statements of the Company contained in the Offering
     Memorandum provide a fair presentation of the consolidated financial
     condition of the Company as of and for the periods ended December 31, 1998.
     The Company and, to my knowledge each of Monsey Products Co. ("Monsey") and
     its subsidiaries:

               (i)  is engaged solely in the lines of business described in the
     Offering Memorandum;

               (ii) does not hold itself out as being engaged primarily, or
     proposes to engage primarily, in the business of investing, reinvesting or
     trading in securities; and


                                          1


               (iii)     do not own or propose to acquire securities having a
     value exceeding 40 percent of the value of its total assets.





          7.   There are no legal or governmental proceedings pending or, to my
     knowledge, threatened to which the Company is a party or to which any of
     its properties or assets is subject which seeks to restrain, enjoin or
     prevent the consummation of or otherwise challenge the issuance or sale of
     the Notes or the consummation of the other transactions described in the
     Final Memorandum under the caption "Sources and Uses of Funds."

          8.   Munger, Tolles & Olson LLP is entitled to rely on the Officer's
     Certificate of the Company delivered on the date hereof pursuant to Section
     7(h) of the Purchase Agreement and the Secretary's Certificate of the
     Company delivered to the Initial Purchaser on the date hereof.



     IN WITNESS WHEREOF, I have executed this Officer's Certificate on behalf of
the Company as of April 22, 1998.



                                   /s/ Jeffrey A. Wahba
                                   -----------------------------------
                                   Jeffrey A. Wahba
                                   Chief Financial Officer


                                          2


                          EXHIBIT A - MATERIAL AGREEMENTS


     1.   Warrant Agreement dated as of October 1, 1997 between Henry Company
          and the Warner W. Henry Living Trust

     2.   Financing and Security Agreement dated as of December 20, 1996 by and
          between Henry Company and NationsBank, N.A.


                                          3