Exhibit 5.1





                          CALFEE, HALTER & GRISWOLD LLP
                                ATTORNEYS AT LAW

                                    Cleveland


                                  March 8, 2004

RPM International Inc.
2628 Pearl Road
P.O. Box 777
Medina, Ohio  44258

         We have acted as counsel for RPM International Inc., a Delaware
corporation (the "Company"), in the preparation of the Registration Statement on
Form S-4 (the "Registration Statement") to be filed with the Securities and
Exchange Commission under the Securities Act of 1933, as amended (the
"Securities Act"), in connection with the Company's offer to exchange all of the
outstanding RPM International Inc. 4.45% Senior Notes due 2009 (the "Initial
Notes") for new 4.45% Senior Notes due 2009 (the "Exchange Notes"). The Initial
Notes were issued under that certain Indenture, dated as of September 30, 2004
(the "Indenture"), between the Company, as issuer, and The Bank of New York, as
trustee (the "Trustee"). The Company issued the Initial Notes pursuant to that
certain Purchase Agreement, dated as of September 27, 2004 (the "Purchase
Agreement"), among the Company, Goldman, Sachs & Co. and each of the Initial
Purchasers named in Schedule A to the Purchase Agreement. The Company is
required to file the Registration Statement pursuant to that certain
Registration Rights Agreement, dated September 30, 2004 (the "Registration
Rights Agreement"), among the Company and Goldman, Sachs & Co.

         For purposes of this opinion, we have reviewed such documents, records
and instruments as we have deemed necessary or appropriate for the purposes of
this opinion. In such review, we have assumed the due authorization, execution
and delivery of each document by, and the validity, binding nature and
enforceability of each document against, each of the parties thereto (other than
the Company), the genuineness of all signatures, the legal capacity of natural
persons, the conformity to original documents of all documents submitted to us
as copies (whether or not certified and including facsimiles) and the
authenticity of such latter documents and of all documents submitted to us as
originals. We have also assumed that (i) the Registration Statement shall have
become effective under the Securities Act; (ii) the Trustee (a) is duly
organized, validly existing and in good standing under the laws of its
jurisdiction of organization, (b) is duly qualified to engage in the activities
contemplated by the Indenture, (c) is in compliance, generally and with respect
to acting as a trustee under the Indenture, with all applicable laws and
regulations, and (d) has the requisite organizational and legal power and
authority to perform its obligations under the Indenture; and (iii) the
Indenture shall have become duly qualified under the Trust Indenture Act of
1939, as amended.

         The Initial Notes are governed by the laws of the State of New York
and, therefore, in rendering our opinion as to the validity and binding effect
of the New Notes, we have relied upon the opinion of Shearman & Sterling LLP
with respect to matters of New York law. Except to the extent of

  {JRB1650.DOC;3}1400 McDonald Investment Center 800 Superior Avenue Cleveland,
                 Ohio 44114-2688 216/622-8200 Fax 216-241/0816

     1100 Fifth Third Center 21 East State Street Columbus, Ohio 43215-4243
                          614/621-1500 Fax 614/621-0010

                                 www.calfee.com





                          CALFEE, HALTER & GRISWOLD LLP

RPM International Inc.
March 8, 2004
Page 2

such reliance, the opinion rendered herein is limited to the laws of General
Corporation Law of the State of Delaware and the federal laws of the United
States.

         Based upon the foregoing, and subject to the further limitations and
qualifications set forth herein, we are of the opinion that:

         The Exchange Notes have been duly authorized by the Company and, when
duly executed, authenticated and delivered upon exchange for the Initial Notes
in accordance with their terms and the terms of the Indenture, will constitute
legally valid and binding obligations of the Company, enforceable against the
Company in accordance with their terms, except as enforcement thereof may be
limited by bankruptcy, insolvency (including without limitation all laws
relating to fraudulent transfers), reorganization, moratorium, or similar laws
affecting enforcement of creditors' rights generally and except as enforcement
thereof is subject to general principles of equity (regardless whether
enforceability is considered in a proceeding in equity or at law).

         We consent to the filing of this opinion with the Registration
Statement and to the use of our name therein under the caption "Legal Matters."
Such consent, however, is not an admission that we are in the category of
persons whose consent is required under Section 7 of the Act.


                                         Very truly yours,


                                         /s/ Calfee, Halter & Griswold LLP

                                         CALFEE, HALTER & GRISWOLD LLP