Titebond WeatherMaster Metal Roof Sealant is specifically formulated to outperform all other sealant technologies, including silicones, tri-polymers, and polyurethanes. This superior polymer formula, provides a waterproof seal against wind, water, dust and dirt. It offers exceptional adhesion to Kynar coated metal materials, along with standard metal, aluminum, steel, galvanized bonderized surfaces, plastics and glass.