DAP 100% Silicone Rubber Window, Door & Siding Sealant is a durable, 100% waterproof and weatherproof, all-purpose sealant. Works great for caulking and sealing out drafts, water and moisture around windows, doors, siding, gutters, flashing, pipes, vents and more. All purpose white silicone stays flexible to withstand expansion and contraction without cracking or losing adhesion. The cured silicone sealant is mold and mildew resistant. DAP caulk and sealants provide durable performance for a variety of projects.