Rust-Oleum Neoprene Rubber Flashing Cement is a 100% synthetic rubber based sealant for sealing and repairing all types of flashing, metal roofs and trailers, built-up roofing, modified bitumen, asphalt, Kynar, EPDM and TPO surfaces. It is ideal for caulking termination bars, metal flashing and fasteners. The premium grade formula has excellent adhesion on wet or dry surfaces and outstanding flexibility. Rust-Oleum Neoprene Rubber Flashing Cement contains no asphalt and dries to a black, paintable finish.