Permatex Muffler & Tailpipe Sealer is a specially formulated, non-shrinking paste that can be used to repair mufflers, tailpipes, and catalytic converters.

Features:
Seal holes and leaks in mufflers, tailpipes and around joints
Waterproofing
Non-shrinking formula
Resists temperatures up to 2000! (1093℃)
Shock resistant

DIRECTIONS: 
Surface should be free of dirt, grease, oil and rust for best results. 
Wet surfaces to be sealed with water. Remove cap and puncture seal.
Apply sealer 1/2” thick around outside of pipe. 
Fit pipe and/or muffler together. Use sealer on all connections to insure leak proof joints. 
Clean up excess muffler and tailpipe sealer with water before it dries.

Allow to dry for 30 minutes, then run engine for 10 minutes.