Gorilla 100% Silicone Sealant is a versatile, 100% waterproof seal perfect for indoor and outdoor use on showers, sinks, windows, doors, gutters, vents, and more. Its 30-minute water-ready formula allows fast exposure to water, while fully curing in 24 hours for durable, long-lasting performance. Mold and mildew resistant, highly flexible, and meeting ASTM C-920, Class 35 standards, it won’t shrink, crack, or yellow over time, maintaining a clean, professional finish. Ideal for home repairs, DIY projects, and professional applications, it delivers a reliable, and multipurpose seal. DIRECTIONS: TO OPEN: Cut nozzle at 45° angle to desired bead size. Completely puncture inner foil seal. TO USE: All surfaces should be clean of dirt, grease, oil, and old sealant. For gaps larger than 1/2", use a backer rod. Best if applied above 40°F (5°C). 1. Insert into cartridge gun. 2. Apply sealant, pushing bead ahead of nozzle. 3. Smooth bead immediately after application, before a skin forms. CLEAN-UP: Wipe off wet sealant immediately with a dry cloth. Isopropyl alcohol may be used according to solvent manufacturer’s instructions. STORAGE: Store in cool, dry location with nozzle attached. To re-use product, remove nozzle and clean out cured sealant from the tip. MOLD & MILDEW RESISTANT: Cured sealant is resistant to mold. Cured sealant must be cleaned regularly with soap and water to prevent growth on top of the sealant. .