GE Marine Silicone 1 Sealant is a 100% silicone sealant ideal for marine use or projects exposed to water or the elements. This silicone sealant offers a shrink and crack-proof seal for durable, long-lasting results on exterior and interior projects. GE Marine Silicone 1 Sealant adheres to most common building materials, including fibreglass, wood, metal, glass, and plastic. It is 100% waterproof and weatherproof, withstanding sun and frost, making for a sun-proof, freeze-proof seal. Our flexible sealant is same-day water-ready to help keep projects on schedule. Backed by a lifetime guarantee, GE warrants that GE Marine Silicone 1 Sealant will not crack, shrink, break down, or wash away.