Pro-Flex Roof Repair Stops leaks immediately and permanently. Adheres Adheres to asphaltic and metal surfaces, sprayed polyurethane foam (SPF), as well as EPDM, Hypalon?,alon?, Neoprene, TPO, PVC, and other prefabricated sheets. Fibered for strength. Will function in severe UV, heat, acid rain, and foot traffic. Withstands water contact immediately after application to stop leaks. Mildew proof. Paintable.