Westlake Chemical Announces Start-Up of Geismar VCM and PVC Operations

Westlake Chemical Announces Start-Up of Geismar VCM and PVC Operations

HOUSTON, Jan. 4 /PRNewswire-FirstCall/ -- Westlake Chemical Corporation (NYSE: WLK) announced today that in late December 2004 it successfully started up its vinyl chloride monomer (VCM) and polyvinyl chloride (PVC) facilities in Geismar, Louisiana. As previously announced this phased start-up will result in approximately 300 million pounds of PVC production per annum.

Westlake Chemical Corporation is a vertically integrated international manufacturer and supplier of petrochemicals, polymers and fabricated products with headquarters in Houston, Texas. The company's range of products includes ethylene, polyethylene, styrene, EDC, VCM, PVC and PVC pipe and PVC windows, fence and decking components. More information about the company may be found at www.westlakechemical.com .

The statements in this release relating to matters that are not historical facts are forward-looking statements that are subject to risks and uncertainties. Actual results could differ materially, based on factors including, but not limited to: the cyclical nature of the chemical industry; availability, cost and volatility of raw materials and utilities; governmental regulatory actions and political unrest; global economic conditions; industry production capacity and operating rates; the supply/demand balance for Westlake's products; competitive products and pricing pressures; access to capital markets; technological developments; and other risk factors. For more detailed information about the factors that could cause actual results to differ materially, please refer to Westlake's Annual Report on Form 10-K for the year ended December 31, 2003, which was filed in March 2004.

SOURCE Westlake Chemical Corporation
CONTACT: media, D. R. Hansen, or investors, Ruth Dreessen, both of
Westlake Chemical Corporation, +1-713-960-9111
Web site: http://www.westlakechemical.com

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