J-B Weld 37912 Muffler Sealer 340G iron reinforced paste resists up to 700 F.
J-B Weld Muffler Seal: MufflerSeal is an iron reinforced paste designed to seal mufflers, pipe joints and exhaust systems. MufflerSeal can resists up to 700 F. Projects: Mufflers, Pipe Joints and Exhaust Systems.