Premium quality, 100% silicone rubber sealant that provides outstanding durability and flexibility for a long-lasting, 100% waterproof and weatherproof seal. Shrink and crack proof. It can be exposed to water after only 30 minutes without washing out. Cured sealant is mould and mildew resistant. Low in odour. Interior/exterior use. Lifetime Guarantee. Meets ASTM C920, Class 25.