Exhibit 23.1 12.31.12 10K

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-118205) and Form S-3 (No. 333-150206 and No. 333-177119) of Westlake Chemical Corporation of our report dated February 22, 2013 relating to the consolidated financial statements, financial statement schedule, and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.