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

only few days is just crack

Easy to apply following the instructions and so far seems to have done the job nicely. Was used to seal a rusted hole at a joint a couple of inches from a silencer section and has done exactly that. Well pleased as it was much cheaper and easier to do than to replace what would've ended up likely being the whole exhaust.

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.

The flange for my catalytic converter is rusting out almost completely and the garage said it's $700 just for the part. Figured I'd try this stuff first and see what it can do. After applying it in the fall the check engine light went away and exhaust sounded and performed back to brand new. I assumed it wouldn't last through the tough Canadian winter and by the end of the winter I started noticing my exhaust getting loud again. Took a look at it and the wrap held up perfectly but my converter is now rusting out from the other side so I'm just going to buy 2 more wraps. These things seem to hold up pretty well. Just going to keep adding wraps until the whole exhaust falls off because who can afford to fix their vehicle anymore with this economy. I did notice there's a bit of a burning smell coming off and it smoked a bit at the start so keep an eye on that but nothing started on fire so probably fine. If my car lights up and burned to the ground it would probably end up being a good thing for me since who can afford to buy a new car in this economy. Might as well just let everything fall apart and burn to the ground these days, since I'll likely own nothing and yeah sure I'll be happy why not. At least we saved 40 grandmas and our governments can make bank off carbon taxes.

Works well. I secured both ends with worm clamps, one on each end. Kept the wrap nice and tight while drying. I didn't turn the car on to heat dry it as I didn't want any exhaust pressure pushing up against the wrap where the hole was. I just let it sit overnight and air dry. My leak was about 1"x0.5". Lots of comments about it not being 72" long. I think these reviewers are just underestimating the circumference of the pipes. Common exhaust piping range from 2" to 3" inner diameter, so larger outer diameter. Let's take 2.5" OD as a median example. Well, that's a 7.85" circumference. 72" divided by 8" is 9. You get 9 wraps around a 2.5" OD exhaust pipe. 2 wraps on each end, and 5 over the hole. Exactly as the instructions describe. I don't expect this to last indefinitely, and neither should you.