Gasket Sealant, Slow Dry Flexible Cure, 11 oz, Black, Temp. Range -65 to 400 Degrees F, Specific Gravity 1.5, Viscosity Paste, Full Cure 24 hr, Begins to Harden 4 hr, Substrates Aluminum, Brass, Cork, Felt, Glass, Iron, Plastic, Rubber, Steel, Seals Flanges, Fittings, Connections and Flexible Assemblies Against Leakage, Used for Cover Plates and Threaded and Hose Connections, Standards Meets Mil Spec Mil-S-45180D, Type II