Titebond WeatherMaster Metal Roof Sealant is a premium-grade, superior polymer formula that offers unbeatable adhesion to all metals including Kynar™ coated metals, aluminum, galvanized steel, copper and most common building materials. It can be extruded in extreme temperatures, remains permanently flexible and will not shrink, adheres well to wet and damp surfaces and is dust and dirt resistant. *Color samples are produced by a printing process that may result in slight color variations. For critical color matching, apply sealant to a sample of the substrate, prior to use. It is the responsibility of the user to determine the suitability of the product for the particular substrate. Colors are best viewed in natural light.