Westlake Chemical Corporation manufactures and markets basic chemicals, vinyls, polymers, and building products. It operates through two segments, Olefins and Vinyls. The Olefins segment offers ethylene, polyethylene, styrene monomer, and various ethylene co-products, as well as sells propylene, crude butadiene, pyrolysis gasoline, and hydrogen. The Vinyls segment provides specialty and commodity PVC, VCM, EDC, chlorine, caustic soda, chlorinated derivative, and ethylene products. This segment also manufactures and sells products fabricated from PVC, including pipe, fittings, profiles, trims, mouldings, fence and decking products, window and door components, and film and sheet products. The company's products are used in various consumer and industrial markets, including flexible and rigid packaging, automotive products, coatings, and residential and commercial construction, as well as other durable and non-durable goods. Westlake Chemical Corporation also offers its products to a range of customers, including chemical processors, plastics fabricators, small construction contractors, municipalities, and supply warehouses primarily in North America and Europe. The company was founded in 1985 and is headquartered in Houston, Texas. Westlake Chemical Corporation is a subsidiary of TTWF LP.