J-B Weld 32927 Ultimate Grey RTV Silicone Gasket Maker and Sealant - 9.5 oz.

J-B Weld Silicone Sealant & Adhesive is a general purpose RTV (Room Temperature Vulcanized) Silicone, designed for sealing and bonding uneven surfaces.Upon curing, which occurs when the product is exposed to the moisture in air, the silicone forms a tough, waterproof seal on most surfaces.It will not shrink or crack, resists weathering and is great for many automotive accessories and household applications.'