[LETTERHEAD OF BRASHER & COMPANY]

Exhibit 5.1
                                 March 27, 2000

Iso Block Products USA, Inc.
8037 S. Datura Street
Littleton, Colorado 80120

     Re: Iso Block Products USA, Inc.
         1993 Compensatory Stock Option Plan

Ladies and Gentlemen:

     We have acted as counsel to Iso Block Products USA, Inc. ("ISO") in
connection with the registration with the Securities and Exchange Commission on
Form S-8 of shares of ISO's common stock, no par value (the "Shares"), which may
be issued in connection with the above-referenced plan (the "Plan"). In
connection with that registration, we have reviewed the proceedings of the Board
of Directors of ISO relating to the registration and proposed issuance of the
common stock, the Articles of Incorporation of ISO and all amendments thereto,
the Bylaws of ISO and all amendments thereto, and such other documents and
matters as we have deemed necessary to the rendering of the following opinion.

     Based upon that review, it is our opinion that the Shares when issued in
conformance with the terms and conditions of the Plan, will be legally issued,
fully paid, and nonassessable under the Colorado Business Corporation Act.

     We do not find it necessary for the purposes of this opinion to cover, and
accordingly we express no opinion as to, the application of the securities or
blue sky laws of the various states as to the issuance and sale of the Shares.

     We consent to the use of this opinion in the registration statement filed
with the Securities and Exchange Commission in connection with the registration
of the Shares and to the reference to our firm under the heading "Interests of
Named Experts and Counsel" in the registration statement.

                                              Very truly yours,

                                              BRASHER & COMPANY


                                              By /s/ John D. Brasher Jr.
                                              --------------------------
                                              John D. Brasher Jr.