J-B Weld Exhaust System Sealant is a heat resistant paste that is used to seal gaps, smooth seams or seal pipe connections within an exhaust system reassembly or repair. The paste is resistant to temperatures up to 850°F with negligible, if any shrinkage.
Temperature resistant sealant
Withstands heat up to 850ºF / 454ºC
Sets in 30 minutes
Non-shrinking