Rtv silicone gasket makers sensor safe size 9.5 ounces color=gray RTV (room temperature vulcanized) silicone gasketing material designed for use in mechanical assemblies and sealing and bonding uneven surfaces. Upon curing, which occurs when the product is exposed to the moisture in air, the silicone forms a tough, wate rproof seal on most surfaces. It will not shrink or crack, resists weathering, is sensor safe, has good temperature resistance up to 500 degrees F intermittent and is great for many automotive applications. 1 hour cure time. RTV (room temperature vulcanized) silicone gasketing material designed for use in mechanical assemblies and sealing and bonding uneven surfaces. Upon curing, which occurs when the product is exposed to the moisture in air, the silicone forms a tough, wate rproof seal on most surfaces. It will not shrink or crack, resists weathering, is sensor safe, has good temperature resistance up to 500 degrees F intermittent and is great for many automotive applications. 1 hour cure time.