SCS1000 Contractors silicone sealant is a one-component acetoxy silicone material that provides excellent weatherability and elasticity for general purpose sealing and bonding. SCS1000 silicone sealant is a paste material, which cures into a flexible rubber when exposed to atmospheric moisture. SCS1000 Contractors 100% silicone is a one-part, sealant used for sealing and glazing, bedding and grouting tile, sealing countertops, fixtures, and drains, and more. The non-sag paste applies easily and quickly attains weather-resistant properties. It won't crack, separate, or dry out, even after years of exposure.