J-B Weld Hi-Temp Red Silicone Gasket Maker & Sealants Designed for use in mechanical assemblies where continuous temperatures of up to 550F (or 660F intermittent) might exist. Forms a tough, waterproof seal on most surfaces. Will not shrink or crack and resists weathering. Great for oil pans, valve covers, exhaust manifolds or water pump, timing covers and oven doors. Pack of 1