EXHIBIT 3.61

                            CERTIFICATE OF AMENDMENT

                                       OF

                          CERTIFICATE OF INCORPORATION

         Westlake CA&O Corporation, a corporation organized and existing under
and by virtue of the General Corporation Law of the State of Delaware, does
hereby certify:

         FIRST: That the sole member of the Board. of Directors of said
corporation, by written consent filed with the minutes of the Board pursuant to
Section 141(f) of the General Corporation Law of the State of Delaware, adopted
a resolution proposing and declaring advisable the following amendment to the
Certificate of Incorporation of said corporation:

         RESOLVED: That the Certificate of Incorporation of Westlake CA&O
Corporation be amended by changing paragraph 1 thereof so that, as amended, said
paragraph shall be and read as follows:

         1. The name of the corporation is WESTLAKE VINYLS, INC.

         SECOND: That in lieu of a meeting and vote of stockholders, the sole
stockholder of said corporation has given written consent to said amendment in
accordance with Section 228 of the General Corporation Law of the State of
Delaware.

         THIRD: That the aforesaid amendment was duly adopted in accordance with
the applicable provisions of Sections 242 and 228 of the General Corporation Law
of the State of Delaware.

         IN WITNESS WHEREOF, Westlake CA&O Corporation has caused this
certificate to be signed by its President this 28th day of September, 2001.

                                           WESTLAKE CA&O CORPORATION

                                              /s/ A. Chao
                                           --------------------------
                                           Albert Chao
                                           President