Westlake Chemical's Geismar Vinyls Complex Back in Operation Following Rita; Lake Charles Complex Awaits Restoration of Full Electrical Power

HOUSTON, Sept. 30 /PRNewswire-FirstCall/ -- Westlake Chemical Corporation (NYSE: WLK) announced today that it has re-started its Geismar, Louisiana vinyls complex following the shut down necessitated by Hurricane Rita. The company's VCM (vinyl chloride monomer) and PVC (polyvinyl chloride) units are currently operating at reduced rates due to constraints associated with the hurricane.

The company's olefins petrochemical complex in Lake Charles, Louisiana remains in a safe, shut-down mode awaiting full restoration of electrical power. Some limited power was restored to the site, and personnel are onsite making minor repairs and monitoring and preparing the facilities for a safe and timely return to operations.

The company is working with its customers on a product by product basis to allocate products in a fair and equitable manner.

Westlake Chemical Corporation is a manufacturer and supplier of petrochemicals, polymers and fabricated products with headquarters in Houston, Texas. The company's range of products includes: ethylene, polyethylene, styrene, propylene, caustic, VCM, PVC and PVC pipe, windows and fence. For more information, visit the company's Web site at http://www.westlakechemical.com .

SOURCE Westlake Chemical Corporation

Ruth I. Dreessen, Investor Relations
David R. Hansen, Media Relations
both of Westlake Chemical Corporation, +1-713-960-9111
Web site: http://www.westlakechemical.com