Westlake Chemical Corporation is a global manufacturer and marketer of basic chemicals, vinyls, polymers and building products. The Company's products include a range of chemicals, which are fundamental to various consumer and industrial markets, including flexible and rigid packaging, automotive products, coatings, water treatment, refrigerants, residential and commercial construction, as well as other durable and non-durable goods. Its segments include Olefins and Vinyls. It manufactures ethylene (through Westlake Chemical OpCo LP (OpCo)), polyethylene, styrene and associated co-products at its manufacturing facility in Lake Charles and polyethylene at its Longview facility. The Company's products in its Vinyls segment include polyvinyl chloride (PVC), vinyl chloride monomer (VCM), ethylene dichloride (EDC), chlor-alkali (chlorine and caustic soda) and chlorinated derivative products and, through OpCo, ethylene. It also manufactures and sells building products fabricated from PVC.