OSI HM270, 10 OZ, White, Construction Silicone Sealant, 1 Part RTV Silicone, Superior Elasticity & Long Life Durability, For Glazing & Sealing, Permanent Watertight & Weatherproof Bond To Glass, Ceramics, Aluminum, Primed Steel & Some Plastics, Withstands -60 Degrees To 400 Degrees & Ultraviolet Light, Excellent Adhesion To Most Nonporous Building Materials Without A Primer, Medium Modulus.