Established in 1983, US Polymers is a corporation that manufactures polyvinyl chloride compounds for customers in the United States. It specializes in the extruding of pipes, shutters, custom profiles, vinyl outdoor storage sheds and fences. The company offers wood shutters and sheds from the ShutterSMART and DURAMAX brands. In addition, it manufactures PVC plastic pipes under the UNSTOP, WATERWARN and SUNSTOP brands. US Polymers operates production facilities in Europe and Middle East. The company is a part of the Harwal Group.