HC-812 is an acrylic self-plasticizing monolithic roof coatings that withstands ultraviolet light, temperature extremes, mildew, weathering, and normal foot traffic. This flexible membrane will accommodate building movement without cracking or splitting. The built-in flexibility is maintained at lower temperatures. RECOMMENDED FOR: FlexRock Coatings TopCoat NOT RECOMMENDED FOR Application over tar-based roofing, EPDM rubber, or ponding water