ALSEAL Weatherseal Silicone Sealant AS-207 is a one-component, non-slumping high performance, 100% neutral cure silicone sealant formulated with calcium carbonate filler system. It gives superior adhesion and durability in a wide range of glazing, weather sealing and trade applications. It has excellent resistance to weathering, UV radiation, vibration, moisture, ozone, temperature extremes, airborne pollutants, and many cleaning detergents and solvents.