J-B Weld ExhaustWeld 2" x 72" Repair Wrap

only few days is just crack

I tried the paste before this and it just cracked, this has stayed in one piece. It works great. Not much to say really. It cures on its own in a couple of hours or you can start the car and cure it quicker with the heat. I let mine sit overnight rather than rush it. Maybe that helps.

Very good product but sadly the repair didn't last as the hole was to big.

This kit is a lifesaver for DIY exhaust repairs. I used it to seal a small leak on my tailpipe, and the results have been fantastic. The high-temperature fiberglass wrap is easy to apply—you just dip it in water and wrap it tightly around the damaged area. Once it cures with the heat of the engine, it hardens into a rock-solid, permanent cast that can withstand temperatures up to 1100°F. It completely stopped the loud exhaust noise and prevented further leaking. It’s a much more affordable and effective alternative to replacing the entire pipe. Highly recommended for any quick and durable exhaust fix!

My wife's car got a crack in the exhaust pipe which also has the front catalytic converter. I did not want to replace it just now, but I also did not want to the pipe to drop if the crack spread. This product wraps around the pipe and will provide supports to about six inches of the pipe. It cures well and seems extremely strong. It is easy to install, just wrap it around. It is good and sticky, has enough length for a few wraps of the pipe, and is certainly a cost effective temporary repair compared to running into the muffler shop. I've had this on her car for a couple of weeks and there is no leakage.