Westlake Corporation manufactures and markets performance and essential materials, and housing and infrastructure products in the United States, Canada, Germany, China, Italy, Taiwan, and internationally.

The Performance and Essential Materials segment offers polyethylene, styrene monomer, ethylene co-products, polyvinyl chloride (PVC), vinyl chloride monomer, ethylene dichloride chlor-alkali, chlorinated derivative products, and epoxy resins.

The Housing and Infrastructure Products segment provides residential PVC siding; PVC trim and mouldings; architectural stone veneer; windows; PVC decking; PVC films for various inflatables, wallcovering, and tape and roofing applications; polymer composite and cement roof tiles; PVC pipes and fittings for various water, sewer, electrical, and industrial applications; PVC compounds used in various housing, medical, and automobile products; and consumer and commercial products, such as landscape edging; industrial, home, and office matting; marine dock edging; and masonry joint controls.

The company offers its products to chemical processors, plastics fabricators, small construction contractors, municipalities, and supply warehouses for use in various consumer and industrial markets, including residential construction, flexible and rigid packaging, automotive products, healthcare products, water treatment, wind turbines, and coatings, as well as other durable and non-durable goods.

The company was formerly known as Westlake Chemical Corporation and changed its name to Westlake Corporation in February 2022.

The company was founded in 1986 and is headquartered in Houston, Texas. Westlake Corporation operates as a subsidiary of TTWF LP.