J-B Weld MufflerSeal Muffler Cement Plastic Tube 6 oz. (37906)

Excellent product!! Used this on a hole in my muffler, and it sealed it perfectly. I did have to cover it twice to ensure a strong hold, but it worked as described. 2 thumbs up on this product!!

Works very well. A bit messy, so you’ll need to wear adequate protective gloves and if you heat up your exhaust pipe or muffler, you will need to work fast. I couldn’t clean off the rust as recommended, but it worked anyhow. This was well worth the money, and is a brand I trust!

I like the tube this comes in for lasting after use even, however the heat did seem to make this putty break off after some driving. Still giving 4 stars though cause it could of been me not doing a good enough clean up job before applying.

This was received by the promised delivery date and I think it has done very well. It was used to fix an exhaust leak near an oxygen sensor and has worked fine.

Had a weld crack 0n wifes 2017 Escape 2.0T. Thanks to FMC , To replace the pipe including the catalycic converter amounted to hundreds of dollars. The factory weld around the flange was cracked open, causing a noisy leak under the SUV. Bought a tube of J-B Weld muffler cement that worked as stated on the back Just ear a pair of rubber gloves cause it's a mother to get off.

My husband was very impressed by this product. He used it on the exhaust manifold flange on an old International tractor. It sealed a leak along with a new gasket.

I applied on a summer day. I allowed to cure and I also applied heat to it. I did that drive the car for several days. it appeared to work. after driving in a few times It cracked and fell off.I applied it over a simple area and it should have held. everything fell off entirely. I do not recommend this

Lasted approximately one month then patched area blew out.