Westlake Corporation, formerly Westlake Chemical Corporation, is a global manufacturer and marketer of essential materials and housing and infrastructure products. The Company provides the building blocks for essential solutions, from housing and construction, to packaging and healthcare, to automotive and consumer. Its segments include Performance and Essential Materials, and Housing and Infrastructure Products. The Company's Performance and Essential Materials segment manufactures and markets polyethylene, styrene monomer, ethylene co-products, polyvinyl chloride (PVC), ethylene dichloride, chlor-alkali (chlorine and caustic soda), and chlorinated derivative products. The Housing and Infrastructure Products segment manufactures and markets products including residential siding, trim and mouldings, stone, roofing, windows, outdoor living products, PVC pipe and fittings and PVC compounds. It offers trim and mouldings products under Royal Trim and Mouldings, and Kleer Lumbe brands.