Henry Pro Grade 988 Silicone White Roof Coating is a professional one-component silicone roof coating. It provides long-lasting protection against weathering due to the effects of the ozone, UV radiation, and extreme temperatures. It can be used on smooth asphaltic BUR, smooth or granulated cap sheets, single ply roof membranes, well-adhered acrylic coating, metal, SPF, and aged membrane roofing. It is recommended that the surface be pressure washed prior to application with at least a 2,000 psi pressure washer. The surface needs to be dry and free of frost. The coating can be applied with a 1/2 inch to 1-inch nap roller, brush, or commercial airless spray rig.