The Baytec(r) SPR polyurethane spray elastomer system from Bayer Corporation (Pittsburgh) is designed to protect the inside of cooling towers from corrosion. With a Shore hardness of at least 66A, as well as added ultraviolet (UV) stabilizers, the Baytec SPR system is used in spray applications to improve the corrosion, weather, and abrasion resistance of metal, concrete, wood, and plastic.