J.B.Weld 32929 Ultimate Black RTV Silicone Gasket Maker and Sealant, 9.5 Oz Thinners Ammonia free

Ammonia free

Built-in damper fits 3" round duct

The model is finished off with molded rubber feet to keep the unit steady while in use

Easy to use aerosol spray can

Dries to a clear matte finish that prevents moisture from seeping into the surface

J.B.Weld 32929 Ultimate Black RTV Silicone Gasket Maker and Sealant, 9.5 Oz Thinners Ammonia freeJ B Weld Ultimate Black Gasket Maker and Sealant is an RTV (Room Temperature Vulcanized) Silicone gasketing material designed for use in mechanical assemblies where maximum petroleum and oil resistance is required. Upon curing, which occurs when the product is exposed to the moisture in air, the silicone forms a tough, waterproof, gasket and seal on most surfaces. It will not shrink or crack, resists oil and petroleum products, resists weathering, is