Premier XtraBond150 – RTV Silicone Sealant is a one-component, permanently flexible, RTV (Room Temperature Vulcanizing) mildew-resistant silicone sealant that is the industry standard. XtraBond 150’s tough chemical resistance makes it a worry-free solution for a wide range of applications. XtraBond150 provides excellent adhesion to cultured marble, tile, glass, vinyl, aluminum, and sheet metal without the need for a primer. The product is engineered to cure rapidly when exposed to atmospheric moisture, to form a durable tight bond that contractors and installers count on. XtraBond150 is approved for cultured marble, provides excellent adhesion to glass, is window & door approved, easy to dispense, easy to tool, is non-sag and slump and is not paintable.