838 TOP™ is a water based, spray applied elastomeric roof coating. 838 TOP™ is a ?Cool Coating? that helps reduce interior building temperatures by lowering the surface temperature of the roof. After application and curing, the coating forms a membrane with outstanding tensile and elongation properties. This membrane protects the roofing substrate from moisture and the sun?s harmful UV light providing excellent weathering resistance and exceeding ASTM D-6083. 838 TOP™ is designed to protect and adhere to a variety of roofing substrates including: metal, EPDM, PVC, spray polyurethane foam (SPF), wood and concrete. It may be applied by brush, roller or airless sprayer. Substrate must not pond water and be free of ice, snow and all types of debris prior to application. Do not apply if air temperature is below 42°F or substrate temperature is above 120°F.