DAP Silicone White Window, Door & Siding Sealant, 9.8 oz. superior durability, flexibility, and adhesion to create a long-lasting waterproof seal. This silicone rubber sealant resists cracking, crumbling, and chalking, ensuring a reliable finish that stands the test of time. It is mildew resistant once cured, making it i for both indoor and outdoor applications. Designed to meet ASTM C920, Specification C719, Class 25 standards, this sealant provides professional-grade performance for windows, doors, and siding projects. Model Number: 8646