THIS WARRANT AND THE COMMON SHARES ISSUABLE UPON EXERCISE
          HEREOF HAVE NOT BEEN REGISTERED UNDER THE UNITED STATES
          SECURITIES ACT OF 1933, AS AMENDED, AND THE RULES AND REGULATIONS
          PROMULGATED THEREUNDER (THE "U.S. SECURITIES ACT"), AND MAY BE
          OFFERED, SOLD OR OTHERWISE TRANSFERRED ONLY (A) TO THE
          CORPORATION, (B) OUTSIDE THE UNITED STATES IN ACCORDANCE WITH
          RULE 904 OF REGULATION S UNDER THE U.S. SECURITIES ACT, (C)
          PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE U.S.
          SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER, IF APPLICABLE,
          AND IN COMPLIANCE WITH ANY APPLICABLE STATE SECURITIES LAWS,
          (D) WITH THE PRIOR WRITTEN CONSENT OF THE CORPORATION PURSUANT TO
          ANOTHER EXEMPTION FROM REGISTRATION UNDER THE U.S. SECURITIES ACT
          AND ANY APPLICABLE STATE SECURITIES LAWS OR (E) PURSUANT TO AN
          EFFECTIVE REGISTRATION UNDER THE U.S. SECURITIES ACT AND IN
          COMPLIANCE WITH APPLICABLE STATE SECURITIES LAWS.  NON-CANADIAN
          CITIZENS SHALL NOT BE AUTHORIZED TO SELL OR REDISTRIBUTE THE
          SECURITIES REPRESENTED HEREBY FOR A MINIMUM PERIOD OF 41 DAYS
          AFTER THE DATE OF ISSUANCE OF THIS WARRANT.


                               AMERICAN ECO CORPORATION

                               Warrant to Subscribe for
                                400,000 Common Shares

          NUMBER _______                                    _________, 1997

          1.   Purchase Rights.  For value received by the undersigned,
               ---------------
               REFCO CAPITAL MARKETS, LTD., a Bermuda corporation, or its
               assignee (the "Holder"), is entitled to subscribe for and
               purchase up to 400,000 fully paid and non-assessable common
               shares without nominal or par value (the "Shares"), as
               constituted on the date hereof, of American Eco Corporation,
               an Ontario, Canada corporation (the "Corporation"), at a
               price of US $7.27 per Share (the price at which one Share
               may be purchased hereunder from time to time is hereinafter
               referred to as the "Exercise Price"), all subject to the
               terms and conditions set forth herein and any adjustment as
               hereinafter provided, by surrendering this Warrant together
               with a subscription in the form attached hereto duly
               completed and executed at the registered office of the
               Corporation.  Rights granted hereunder shall terminate at
               5:00 p.m., New York City time, on May 29, 2002 (hereinafter
               referred to as the "Time of Expiry").

          2.   Partial Exercise.  The Holder may subscribe for and purchase
               ----------------
               less than the full number of Shares of the Corporation
               entitled to be subscribed for and purchased hereunder.  In
               the event that the Holder subscribes for and purchases less
               than the full number of Shares entitled to be subscribed for
               and purchased under the Warrant, the Corporation shall issue
               a new Warrant to the Holder in the same form as this Warrant
               with the appropriate changes in respect of the remaining
               number of Shares for which the Holder is entitled to
               subscribe.

          3.   Delivery of Certificates.  Within three business days of
               ------------------------
               receipt of this Warrant, together with a subscription form
               substantially in the form annexed hereto duly completed and
               executed, the Corporation shall deliver or cause to be
               delivered to the Holder a certificate or certificates
               representing the Shares subscribed for and purchased by the
               Holder hereunder and a new Warrant, if any, against payment
               of such Shares by certified check, bank draft or money order
               in lawful money of the United States payable to or to the
               order of the Corporation.

          4.   Warrant Holder Not A Shareholder.  Nothing contained in this
               --------------------------------
               Warrant shall be construed as conferring upon the Holder any
               right or interest whatsoever as a holder of Shares of the
               Corporation or any other right or interest except as herein
               expressly provided.

          5.   Adjustments.
               -----------

               (a)  Adjustment on Reclassification.  In case of any
                    ------------------------------
                    reclassification of the Shares or change of the Shares
                    into other shares or in case of the consolidation,
                    merger, reorganization or amalgamation of the
                    Corporation with or into any other corporation or
                    entity which results in any reclassification of the
                    Shares or a change of the Shares into other shares or
                    in case of any transfer of the undertaking or assets of
                    the Corporation as an entirety or substantially as an
                    entirety to another person (any such event being
                    hereinafter referred to as a "Reclassification of
                    Shares"), at any time prior to the Time of Expiry,
                    after the effective date of such Reclassification of
                    Shares and upon exercise of the right to purchase
                    Shares hereunder, the Holder shall be entitled to
                    receive and shall accept, in lieu of the number of
                    Shares to which the Holder was theretofore entitled
                    upon such exercise, the kind and amount of shares and
                    other securities or property which the Holder would
                    have been entitled to receive as a result of such
                    Reclassification of Shares if on the effective date
                    thereof the Holder had been the registered Holder of
                    the number of Shares to which the Holder was
                    theretofore entitled upon such exercise.  If necessary,
                    appropriate adjustments shall be made in the
                    application of the provisions set forth in this Section
                    S with respect to the rights and interest thereafter of
                    the Holder of this Warrant to the end that the
                    provisions set forth in this Section 5 shall thereafter
                    correspondingly be made applicable as nearly as may be
                    reasonable in relation to any shares or other
                    securities or property thereafter deliverable upon the
                    exercise of this Warrant.

               (b)  Adjustment on Capital Reorganization.  If and whenever
                    ------------------------------------
                    at any time prior to the Time of Expiry, the
                    Corporation shall:

                    (i)  subdivide the Shares into a greater number of
                         shares;

                    (ii) consolidate the Shares into a lesser number of
                         shares; or

                    (iii)     issue Shares of Convertible Securities to all
                              or substantially all of the holders of Shares
                              by way of a stock divided or other
                              distribution on the Shares payable in Shares
                              or Convertible Securities;

                    (any such event being hereinafter referred to as a
                    "Capital Reorganization"), and any such event results
                    in an adjustment in the Exercise Price pursuant to
                    paragraph (c), the number of Shares purchasable
                    pursuant to this Warrant shall be adjusted
                    contemporaneously with the adjustment of the Exercise
                    Price by multiplying the number of Shares theretofore
                    purchasable on the exercise thereof by a fraction the
                    numerator of which shall be the Exercise Price in
                    effect immediately prior to such adjustment and the
                    denominator of which shall be the Exercise Price
                    resulting from such adjustment.  For the purpose of
                    this Section 5, "Convertible Security" means a security
                    convertible into or exchangeable for a Share.

               (c)  Adjustment to Exercise Price.  If and whenever at any
                    ----------------------------
                    time prior to the Time of Expiry, the Corporation shall
                    engage in a Capital Reorganization, the Exercise Price
                    shall, on the effective date in the case of a
                    subdivision or consolidation, or on the record date, in
                    the case of a stock dividend, be adjusted by
                    multiplying the Exercise Price in effect on such
                    effective date or record date by a fraction: (i) the
                    numerator of which is the number of Shares outstanding
                    before giving effect to such Capital Reorganization;
                    and (ii) the denominator of which shall be the number
                    of Shares outstanding after giving effect to such
                    Capital Reorganization.  The number of Shares
                    outstanding shall include the deemed conversion into or
                    exchange for Shares of any Convertible Securities
                    distributed by way of stock dividend or other such
                    distribution.  Such adjustment shall be made
                    successively whenever any event referred to in this
                    paragraph shall occur.

               (d)  Effect of Stock Dividends.  An issue of Shares or
                    -------------------------
                    Convertible Securities by way of a stock dividend or
                    other such distribution shall be deemed to have been
                    made on the record date thereof for the purpose of
                    calculating the number of outstanding Shares under
                    paragraphs (e) and (f).

               (e)  Effect of Rights Offering.  If and whenever at any time
                    -------------------------
                    prior to the Time of Expiry, the Corporation shall fix
                    a record date for the issuance of rights, options or
                    warrants (other than this Warrant) to all or
                    substantially all the holders of Shares entitling them,
                    for a period expiring not more than 45 days after such
                    record date, to subscribe for or purchase Shares or
                    Convertible Securities at a price per share (or having
                    a conversion or exchange price per share) of less than
                    90% of the Current Market Price of the Shares on such
                    record date (any such event being hereinafter referred
                    to as a "Rights Offering"), the Exercise Price shall be
                    adjusted immediately after such record date so that it
                    shall equal the price determined by multiplying the
                    Exercise Price in effect on such record date by a
                    fraction;

                    (i)  the numerator of which shall be the aggregate of: 
                         (A) the number of Shares outstanding on such
                         record date; and (B) a number determined by
                         dividing whichever of the following is applicable
                         by the Current Market Price of the Shares on the
                         record date: (I) the amount obtained by
                         multiplying the number of shares which the holders
                         of Shares are entitled to subscribe for or
                         purchase by the subscription or purchase price; or
                         (II) the amount obtained by multiplying the
                         maximum number of Shares which the holders of the
                         Shares are entitled to receive on the conversion
                         or exchange of the Convertible Securities by the
                         conversion or exchange price per share; and

                    (ii) the denominator of which shall be the aggregate
                         of:  (A) the number of Shares outstanding on such
                         record date; and (B) whichever of the following is
                         applicable:  (I) the number of Shares which the
                         holders of Shares are entitled to subscribe for or
                         purchase; or (II) the maximum number of Shares
                         which the holders of Shares are entitled to
                         receive on the conversion or exchange of the
                         Convertible Securities.

                    Any Shares owned by or held for the account of the
                    Corporation shall be deemed not to be outstanding for
                    the purpose of any such computation.  Such adjustment
                    shall be made successively whenever such a record date
                    is fixed.

                    To the extent that such Rights Offering is not so made
                    or any such rights, options or warrants are not
                    exercised prior to the expiration thereof, the Exercise
                    Price shall be readjusted to the Exercise Price which
                    would be in effect if such record date had not been
                    fixed or if such expired rights, options or warrants
                    had not been issued.

               (f)  Effect of Special Distribution.  If and whenever at any
                    ------------------------------
                    time during the Exercise Period, the Corporation shall
                    fix a record date for the distribution to all or
                    substantially all the holders of the Shares of:

                    (i)  shares of any class other than Shares;

                    (ii) rights, options or warrants;

                    (iii)     evidences of indebtedness; or

                    (iv) other assets or property;

                    and if such distribution does not constitute a Capital
                    Reorganization or a Rights Offering or does not consist
                    of rights, options or warrants entitling the holders of
                    Shares to subscribe for or purchase Shares or
                    Convertible Securities for a period expiring not more
                    than 45 days after such record date and at a price per
                    share (or having a conversion or exchange price per
                    share) of at least 90% of the Current Market Price of
                    the Shares on such record date (any such non-excluded
                    event being hereinafter referred to as a "Special
                    Distribution") the Exercise Price shall be adjusted
                    immediately after such record date so that it shall
                    equal the price determined by multiplying the Exercise
                    Price in effect on such record date by a fraction:  (I)
                    the numerator of which shall be the amount by which (A)
                    the amount obtained by multiplying the number of Shares
                    outstanding on such record date by the Current Market
                    Price of the Shares on such record date, exceeds (B)
                    the fair market value (as determined by the directors
                    of the Corporation, which determination shall be
                    conclusive) to the holders of such Shares of such
                    Special Distribution; and (II) the denominator of which
                    shall be the total number of Shares outstanding on such
                    record date multiplied by such Current Market Price.

                    Any Shares owned by or held for the account of the
                    Corporation shall be deemed not to be outstanding for
                    the purpose of any such computation.  Such adjustment
                    shall be made successively whenever such a record date
                    is fixed.

                    To the extent that such Special Distribution is not so
                    made or any such rights, options or warrants are not
                    exercised prior to the expiration thereof, the Exercise
                    Price shall then be readjusted to the Exercise Price
                    which would then be in effect if such record date had
                    not been fixed or if such expired rights, options or
                    warrants had not been issued.

               (g)  Dividend Adjustment Limitation.  No adjustment pursuant
                    ------------------------------
                    to this Section 5 shall be made in respect of dividends
                    (payable in cash or Shares) declared payable on the
                    Shares in any fiscal year of the Corporation to the
                    extent that such dividends, when aggregated with any
                    dividends previously declared payable on the Shares in
                    such fiscal year, do not exceed 50% of the aggregate
                    consolidated net income of the Corporation before
                    extraordinary items for its immediately preceding
                    fiscal year.

               (h)  Deferral of Share Issuance.  In any case in which this
                    --------------------------
                    Section 5 shall require that an adjustment shall become
                    effective immediately after a record date for an event
                    referred to herein, the Corporation may defer, until
                    the occurrence of such event, issuing to the Holder,
                    upon the exercise of this Warrant after such record
                    date and before the occurrence of such event, the
                    additional Shares issuable upon such exercise by reason
                    of the adjustment required by such event; provided,
                    however, that the Corporation shall deliver to the
                    Holder an appropriate instrument evidencing the
                    Holder's right to receive such additional Shares upon
                    the occurrence of the event requiring such adjustment
                    and the right to receive any distributions made on such
                    additional Shares on and after such exercise.

               (i)  Cumulative Effect.  The adjustments provided for in
                    -----------------
                    this Section 5 are cumulative and, in the case of
                    adjustments to the Exercise Price, shall be computed to
                    the nearest one-tenth of one cent, and shall apply
                    (without duplication) to successive Reclassifications
                    of Shares, Capital Reorganizations, Rights Offerings
                    and Special Distributions; provided that,
                    notwithstanding any other provision of this Section 5,
                    no adjustment of the Exercise Price shall be required
                    unless such adjustment would require an increase or
                    decrease of at least 1% of the Exercise Price then in
                    effect (provided however that any adjustments which by
                    reason of this paragraph are not required to be made
                    shall be carried forward and taken into account in any
                    subsequent adjustment).

               (j)  No Adjustment if Participation Rights Available.  No
                    -----------------------------------------------
                    adjustment in the number of Shares which may be
                    purchased upon exercise of this Warrant or in the
                    Exercise Price shall be made pursuant to this Warrant
                    if the Holder is entitled to participate in such event
                    on the same terms mutatis mutandis as if the Holder had
                                      ------- --------
                    exercised this Warrant for Shares prior to the
                    effective date or record date of such event.  Any
                    participation by the Holder shall require the prior
                    approval of The Toronto Stock Exchange if the Shares
                    are then listed on the Toronto Stock Exchange.

               (k)  Resolution of Disputes.  In the event of any question
                    ----------------------
                    arising with respect to the adjustments provided in
                    this Section 5, such question shall conclusively be
                    determined by an internationally recognized firm of
                    independent chartered accountants appointed by the
                    Corporation (who may be the Corporation's auditors)
                    with the consent of the Holder, which consent may not
                    be unreasonably withheld.  Such accountants shall have
                    access to all necessary records of the Corporation and
                    such determination shall be binding upon the
                    Corporation and the Holder.

               (l)  Reservation of Shares.  As a condition precedent to the
                    ---------------------
                    taking of any action which would require an adjustment
                    in the subscription rights pursuant to this Warrant
                    including the Exercise Price and number of such classes
                    of shares or other securities or property which are to
                    be received upon the exercise thereof, the Corporation
                    shall take all corporate action which, in the opinion
                    of counsel, may be necessary in order that the
                    Corporation has reserved and there will remain unissued
                    out of its authorized capital a sufficient number of
                    Shares for issuance upon the exercise of this Warrant
                    and that the Corporation may validly and legally issue
                    as fully paid and non-assessable all the shares of such
                    classes or other securities or may validly and legally
                    distribute the property which the Holder is entitled to
                    receive on any exercise of this Warrant.

               (m)  Notice of Adjustment Event.  At least four days prior
                    --------------------------
                    to the effective date or record date, as the case may
                    be, of any event which requires an adjustment in the
                    subscription rights pursuant to this Warrant, including
                    the Exercise Price and number and classes of shares or
                    other securities or property which are to be received
                    upon the exercise thereof, the Corporation shall give
                    notice to the Holder of the particulars of such event
                    and the required adjustment.

          6.   No Fractional Shares.  The Corporation shall not issue
               --------------------
               fractional Shares upon the exercise of this Warrant.

          7.   Definition of Current Market Price.  For the purpose of any
               ----------------------------------
               computation under this Warrant, the "Current Market Price"
               at any date shall mean (i) the average closing bid price for
               a share on the Nasdaq National Market ("Nasdaq") as reported
               by Nasdaq or (ii) if the shares are not then listed on
               Nasdaq, the average closing price for at least one board lot
               sale of the Shares on The Toronto Stock Exchange, in each
               case for the 30 consecutive trading days commencing 45
               trading days before the date for determining the Current
               Market Price.

          8.   Registration Rights.
               -------------------

               (a)  Registration.  The Corporation shall file, as promptly
                    ------------
                    as practicable after the date hereof and in no event
                    later than June 30, 1997, a registration statement (the
                    "Registration Statement") under the U.S. Securities Act
                    covering the sale and resale (if necessary to permit
                    the unrestricted resale of the Shares under the U.S.
                    Securities Act) of the Shares or other securities
                    issuable upon any purchase hereunder (the "Registrable
                    Securities").

               (b)  Registration Procedures.  The Corporation shall use its
                    -----------------------
                    best efforts to cause the Registration Statement to
                    become and remain effective pursuant to Rule 415 under
                    the U.S. Securities Act.  Thereafter, until (1) such
                    Registrable Securities have been sold without
                    restriction on the subsequent transfer thereof, (2) 30
                    days after the Time of Expiry or (3) the Registrable
                    Securities may be publicly sold in the United States
                    without registration and without any limitation on
                    volume or manner of sales under the U.S. Securities
                    Act, whichever is the shortest period of time, the
                    Corporation shall:

                    (i)  Prepare and file with the U.S. Securities and
                         Exchange Commission (the "Commission") such
                         amendments and supplements to the Registration
                         Statement and the prospectus included therein
                         (including any preliminary prospectus) as may be
                         necessary to keep the Registration Statement
                         effective;

                    (ii) Furnish to Holder and its legal counsel (1)
                         promptly when the same is delivered, copies of all
                         correspondence to and from the Commission relating
                         to the Registration Statement, (2) such reasonable
                         number of copies of the Registration Statement,
                         preliminary prospectus, final prospectus and any
                         supplements and amendments thereof and (3) such
                         other documents as Holder may reasonably request
                         in order to facilitate the public offering of such
                         Registrable Securities;

                  (iii)  Permit counsel designated by Holder to review
                         at Holder's sole expense the Registration
                         Statement and all amendments and supplements
                         thereto a reasonable period of time prior to
                         their filing with the Commission;

                    (iv) Use its best efforts to register or qualify the
                         Registrable Securities covered by the Registration
                         Statement under the state securities laws of such
                         jurisdictions as Holder may reasonably request
                         within 20 days following the original filing of
                         the Registration Statement and do any and all
                         other acts and things which may be reasonably
                         necessary or advisable to enable Holder to
                         consummate the disposition of such Registrable
                         Securities in such jurisdictions (provided that
                         the Corporation will not be required to
                         (i) qualify generally to do business in any
                         jurisdiction where it would not otherwise be
                         required to qualify but for this subparagraph (b);
                         (ii) subject itself to taxation in any such
                         jurisdiction; or (iii) consent to general service
                         of process in any such jurisdiction);

                    (v)  Notify Holder promptly after it shall receive
                         notice thereof, of the time when the Registration
                         Statement has become effective or any amendment or
                         supplement to the Registration Statement or any
                         prospectus included therein has been filed;

                    (vi) Notify Holder promptly of any request by the
                         Commission for the amending or supplementing of
                         the Registration Statement or prospectus or for
                         additional information;

                    (vii)     Prepare and file with the Commission,
                              promptly upon Holder's request any amendments
                              or supplements to the Registration Statement
                              or prospectus which, in the opinion of
                              Holder's counsel, are required under the U.S.
                              Securities Act in connection with the
                              distribution of Shares;

                    (viii)    Promptly notify Holder at any time when a
                              prospectus relating to such Registrable
                              Securities is required to be delivered under
                              the U.S. Securities Act, if any event shall
                              have occurred as the result of which any such
                              prospectus or any other prospectus as then in
                              effect would include an untrue statement of a
                              material fact or omit to state any material
                              fact necessary to make the statements
                              therein, in light of the circumstances in
                              which they were made, not misleading and
                              promptly prepare and file with the Commission
                              a supplement or amendment to such prospectus
                              so that, as thereafter delivered to the
                              purchasers of Registrable Securities, such
                              prospectus will not contain an untrue
                              statement of material fact or omit to state
                              any material fact necessary to make the
                              statements therein, in light of the
                              circumstances in which they were made, not
                              misleading;

                    (ix) Advise Holder promptly after the Corporation shall
                         receive notice, or obtain knowledge thereof, of
                         the issuance of any stop order by the Commission
                         suspending the effectiveness of the Registration
                         Statement or the initiation or threatening of any
                         proceeding for that purpose and promptly use its
                         best efforts to prevent the issuance of any stop
                         order or to obtain its withdrawal if such stop
                         order should be issued;

                    (x)  Not file any amendment or supplement to the
                         Registration Statement or prospectus to which
                         Holder or its counsel shall have objected on the
                         grounds that such amendment or supplement does not
                         comply in all material respects with the
                         requirements of the U.S. Securities Act or the
                         rules and regulations thereunder;

                    (xi) Make available for inspection by Holder and any
                         underwriter participating in any disposition
                         pursuant to the Registration Statement and any
                         attorney, accountant or other agent retained by
                         such persons, all financial and other records,
                         pertinent corporate documents and properties of
                         the Corporation and cause the Corporation's
                         officers, directors, employees and independent
                         accountants to supply all information and
                         documents reasonably requested by Holder or
                         Holder's underwriter, attorney, accountant or
                         agent in connection with the Registration
                         Statement;

                    (xii)     Use its best efforts to cause all such
                              Registrable Securities to be listed or quoted
                              on Nasdaq or a United States national
                              securities exchange of comparable liquidity;
                              and

                    (xiii)    Cause the Shares issuable upon a purchase
                              hereunder to be listed on Nasdaq immediately
                              after the Registration Statement becomes
                              effective and maintain such listing.

               (c)  Expenses.  All fees, costs and expenses of registration
                    --------
                    shall be borne by the Corporation provided, however,
                    that Holder and any other holder of Registrable
                    Securities shall bear its pro rata share of any
                    underwriting discounts and commissions if a majority of
                    such holders elect to have the Registrable Securities
                    sold through an underwritten offering, as well as the
                    fees of its own counsel.  The fees, costs and expenses
                    of registration to be borne by the Corporation shall
                    include without limitation, all internal costs
                    (including without limitation, all salaries and
                    expenses of its officers and employees performing legal
                    or accounting duties), all Commission and Nasdaq filing
                    fees, listing or quotation fees, printing expenses fees
                    and disbursements of counsel and accountants for the
                    Corporation (including, the cost of any special audit
                    requested in order to effect such registration), all
                    legal fees and disbursements and other expenses of
                    complying with U.S. state securities laws of any
                    jurisdiction in which the Registrable Securities to be
                    offered are to be registered or qualified, reasonable
                    fees and disbursements of counsel and accountants for
                    Holder and any other holders of Registrable Securities,
                    and the premiums and other costs of policies of
                    insurance against liability arising out of such public
                    offering which the Corporation determines to obtain,
                    but shall not include underwriting discounts and
                    commissions attributable to Shares not sold for the
                    account of the Corporation.

               (d)  Indemnification by the Corporation.  Subject to the
                    ----------------------------------
                    conditions set forth below, in connection with any
                    registration of Registrable Securities pursuant to
                    Section (a) or (b) above, the Corporation agrees to
                    indemnify and hold harmless Holder, any underwriter for
                    the offering and each of their officers, directors and
                    agents and each other person, if any, who controls
                    Holder or such underwriter within the meaning of
                    Section 15 of the U.S. Securities Act as follows:

                    (i)  Against any and all loss, claim, damage and
                         expense whatsoever, including attorneys' fees and
                         expenses, including attorney's fees and expenses,
                         arising out of or based upon (including, but not
                         limited to, any and all expense whatsoever
                         reasonably incurred in investigating, preparing or
                         defending any litigation, commenced or threatened,
                         or any claim whatsoever based upon) any untrue or
                         alleged untrue statement contained in any
                         preliminary prospectus (if used prior to the
                         effective date of the Registration Statement), the
                         Registration Statement or the prospectus (as from
                         time to time amended and supplemented), or in any
                         application or other document executed by the
                         Corporation or based upon written information
                         furnished by the Corporation filed in any
                         jurisdiction in order to qualify the Corporation's
                         securities under the securities laws thereof; or
                         the omission or alleged omission therefrom of a
                         material fact required to be stated therein or
                         necessary to make the statements therein not
                         misleading; or any other violation of applicable
                         federal or state statutory or regulatory
                         requirements or limitations relating to action or
                         inaction by the Corporation in the course of
                         preparing, filing or implementing the Registration
                         Statement; provided, however, that the indemnity
                         contained in this subsection (i) shall not apply
                         to a Holder of Registrable Securities with respect
                         to any loss, claim, damage, liability or action
                         arising out of or based upon any untrue or alleged
                         untrue statement or omission made in reliance upon
                         and in conformity with any information furnished
                         in writing to the Corporation by or on behalf of
                         such Holder expressly for use in connection
                         therewith;

                    (ii) Subject to the proviso contained in subsection (i)
                         above, against any and all loss, liability, claim,
                         damage and expense whatsoever, including
                         attorneys' fees and expenses, to the extent of the
                         aggregate amount paid in settlement of any
                         litigation, commenced or threatened, or of any
                         claim whatsoever based upon any such untrue
                         statement or omission or any such alleged untrue
                         statement or omission (including but not limited
                         to, any and all expense whatsoever reasonably
                         incurred in investigating, preparing or defending
                         against any such litigation or claim) if such
                         settlement is effected with the written consent of
                         the Corporation.

                    (iii)     The Corporation shall be entitled to
                              participate at its own expense in the defense
                              of any suit brought to enforce any such
                              claim, but if the Corporation elects to
                              assume the defense, such defense shall be
                              conducted by counsel chosen by it, provided
                              that such counsel is reasonably satisfactory
                              to Holder and any other holders of
                              Registrable Securities or controlling persons
                              who are defendants in any suit so brought. 
                              In the event the Corporation elects to assume
                              the defense of any suit and retain such
                              counsel, such holders or controlling persons
                              shall, after the date they are notified of
                              such election, bear the fees and expenses of
                              any counsel thereafter retained by them as
                              well as any other expenses thereafter
                              incurred by them in connection with the
                              defense thereof unless, in the reasonable
                              opinion of such holders or controlling
                              persons, separate representation is advisable
                              because of conflict in the interest of the
                              parties, in which case the Corporation shall
                              continue to pay the fees of such counsel.

               (e)  Indemnification of Corporation.  Holder shall indemnify
                    ------------------------------
                    and hold harmless the Corporation, any underwriters for
                    the offering and each of their officers and directors
                    and agents and each other person, if any, who controls
                    the Corporation or such underwriters within the meaning
                    of Section 15 of the U.S. Securities Act against any
                    and all such losses, liabilities, claims, damages and
                    expenses as are indemnified against by the Corporation
                    under Section 8(d); provided however, that such
                    indemnification shall be limited to statements or
                    omissions, if any, made (or in settlement of any
                    litigation effected with Holder's written consent,
                    alleged to have been made) in any preliminary
                    prospectus, the Registration Statement or prospectus or
                    any amendment or supplement thereof or any application
                    or other document in reliance upon and in conformity
                    with, written information furnished by Holder or on
                    Holder's behalf expressly for use in any preliminary
                    prospectus, the Registration Statement or prospectus or
                    any amendment or supplement thereof.  In case any
                    action shall be brought against the Corporation or any
                    other person so indemnified, in respect of which
                    indemnity may be sought against Holder, Holder shall
                    have the rights and duties given to the Corporation,
                    and each other person so indemnified shall have the
                    rights and duties given to Holder by the provisions of
                    Section 8(d)(iii).

          9.   Listing and Reservation of Shares.  All Shares entitled to
               ---------------------------------
               be purchased hereunder have been approved for listing on the
               Toronto Stock Exchange and on Nasdaq and shall be listed
               thereon upon their issuance.  The Corporation has reserved
               and there will remain unissued out of its authorized capital
               a sufficient number of Shares for issuance upon the exercise
               of this Warrant.

          10.  Governing Law.  This Warrant shall be governed by and
               -------------
               construed in accordance with the laws of the United States
               and the internal laws of the State of New York.

          11.  Assignment.  Subject to compliance with the restrictions set
               ----------
               forth on the face of this Warrant, this Warrant may be
               assigned by the Holder in whole or in part.

          IN WITNESS WHEREOF, the Corporation has caused this Warrant to be
          executed by one of its duly authorized officers.


                                             AMERICAN ECO CORPORATION


                                             By:                           
                                                  -------------------------
                                                  Michael E. McGinnis
                                                  President and CEO





               FOR VALUE RECEIVED, _______________ hereby sells, assigns
          and transfers unto _______________ Warrants to subscribe for
          ________ (        ) Shares of the no par value common shares of
          American Eco Corporation standing in name on the books of said
          corporation represented by Warrant No. ____________ herewith and
          do hereby irrevocably constitute and appoint Corporation attorney
          to transfer the said Warrant on the books of the within named
          Corporation with full power of substitution in the premises.

               Dated     _______________

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

          
                                  SUBSCRIPTION FORM


          TO:  AMERICAN ECO CORPORATION

          RE:  WARRANT TO SUBSCRIBE FOR 400,000 COMMON SHARES DATED
                  ____________, 1997 (the "Warrant")


               The undersigned holder of the Warrant hereby subscribes for
          ________ common shares (the "Shares") of American Eco Corporation
          or such number of Shares and/or other securities and/or property
          to which such subscription entitles the undersigned holder in
          lieu thereof or addition thereto under the provisions of the
          Warrant pursuant to the terms of the Warrant at the Exercise
          Price (as defined in the Warrant) per share on the terms
          specified in the Warrant and encloses herewith a bank draft,
          certified check or money order in lawful money of the United
          States payable to the order of American Eco Corporation in
          payment therefor.

               The undersigned irrevocably hereby directs that   ________
          Shares be issued and delivered to _________________________.

               DATED this ________ day of _______________, 19____.


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


                                             By:                           
                                                  -------------------------