Matrix 204 Wet/Dry Roof Cement has unique water-displacing characteristics, which ensure superior bonding to both wet and dry substrates and surfaces. This product is a general purpose, asbestos-free formulation for wet weather repair of roof leaks. Heavy, "trowel-grade" consistency makes this product ideal for flashing details and a variety of roofing and waterproofing repairs, such as moving joints and roof penetrations.