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

So what if it is a little messy...it should be so plenty of material for the cloth tape. They give a set of gloves for the hands and spread a little paper under your work and not a problem!This was my second purchase of this product for a hacked together exhaust for my portable generator to get the exhaust [ported out of the garage. Fist kit used and I let it set and it cured at Washington State ambient summer temperature. Last week there was a power failure and i finally used my get and the kit/patch held up just fine, though the aluminum tape came right off with the heat the wrap did not. But the pipe blew off in another spot so my second kit is to secure that splice.This time I used a heat gun to cure the wrap and did not bother with the aluminum tape. The wrap cured very quickly with the heat gun, it is not summer anymore so the extra heat was a good idea. Looking forward to the next power failure, I think I have it nailed! Great product J-B Weld!

I trust the brand, and I've had exhaust repair wrap fail before, so I went with JB Weld. Most repair tape is slightly sticky and has resin that melts and then cures in place. This stuff is fiberglass roving (cloth) that's in a packet of premixed wet epoxy. It's slippery and goopy. It's messy and a little tricky, especially if you don't have a lot of clearance.That said, the wrap is pretty forgiving, so you don't have to be perfect with it. The lightweight nitrile gloves included will probably tear, and I recommend having your own better-weight disposable gloves already. Don't work with your face below the pipe, because you may drip epoxy. Wear workclothes accordingly, and clean off any epoxy that gets on your skin.The pack includes aluminum tape to hold the wrap in place while it cures. I didn't use that -- I used stainless steel zip ties -- so I don't know how well the tape works, but it's probably OK. The epoxy takes a couple of hours to dry unless you sit there with the engine idling to keep the exhaust pipe hot. It seems secure when it's dry. This stuff is rated for higher temperatures than most repair wraps, which is definitely promising.

While it works as described, it requires a LOT of prep time and effort for it to work. It should ONLY be used as a short-term fix as it will not last indefinitely. I knew this going in, but I wanted to make sure buyers know this. It handles heat well, stopped the exhaust leak, and lasted longer than I expected, I was able to get about 7-8 months out of it before it failed.

This exhaust tape works pretty well. Took care of the problem even over rusty and rough tail pipe! Great product to get you down the road!

Worked for a couple months before falling off. Until it fell of, it worked great. But disappointing that it didn't last longer

If your exhaust leak is in a tight spot, which most are, this product is difficult to use. Imagine loosing grip of the roll of mesh and have a goopy drippy mess dangling in your face. However, after a thorough cleaning with a wire brush and 36 grit sandpaper, I did manage to get it wrapped around the crack the developed between the catalytic converter and the pipe. The enclosed aluminum tape? Forget it. Use it for something else. Smooth the repair over good with your hands. Take the pouch it came in and squeeze the remaining compound out like its the very end of your last tube of toothpaste and slather that over the repair are well, massaging it into the mesh,I didn't like the idea of starting the engine and letting it cure with exhaust heat either. Let it cold cure for a couple hours, start the engine and let it run for about 10 minutes, then let it cool off. Then take the vehicle for a short easy drive. Keep your foot out of it to avoid a blowout. Let it completely cool off again, then its business as usual.So far I can't speak for the longevity of this product. I drove it a couple of times, and then it passed the safety inspection. Yesterday I ran the truck pretty hard for about 20 miles, and so far so good!I think the key to a long lasting repair with this product is starting with a clean surface that has been scored to promote better adhesion, and giving it a slow gradual curing with a heat and cool/expansion and contraction cycles.UPDATE: Unless you're just trying to get thru a state inspection, better think twice about this product. I put a little over 100 miles on the truck local driving and it held up OK, but yesterday I took it on a 300 mile road trip. By the time I got home it was getting noisy again. BUT, it did get me thru PA state inspection. I don't have to worry about fixing it until warm weather gets here again.

I used it to patch some cast iron on a wood stove. Probably leaks CO, but it's a big room. It is holding up nicely.

Works great on cracked manifolds