J-B WELD 31919 Sealant and Adhesive, 3 oz

J-B WELD Black silicone sealant and 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.