Kool Seal Storm Patch, Gallon, Premium Wet/Dry Patching Cement, Single Component, Asbestos Free, Asphalt Based Cement Especially Suited For Asphalt Based Roofing Substrates, Seals Quickly, Will Not Pull Apart Or Lose Its Bond, Remains Soft & Pliable & Resists Temperature Change, Can Be Applied To Wet Or Dry Surfaces, Even Underwater.