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

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.

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!

Good for a pinch and when you dont have any alternatives before you can get a real fix. Only thing to remember is that it is permanent and will mess up your pipes or surface if you need to remove it. My muffler shop had to grind this off to be able to weld the new muffler/pipe on.

If you use this kit exactly according to the instructions it will work great. My leak was a hole about 3/4" wide and about 3" long, in a curve about two feet in front of the resonator tips. The exhaust is dual, but located about an inch apart. Just enough space to get the wrap through the gap. I prepped the surface with a wire wheel on my drill. I made the surface shiny all the way around the pipe and two inches on each side of the hole. So I had about 5" of pipe to wrap. I squeezed the pouch as directed and used the gloves. This stuff is a little drippy and messy, but if you are careful and operate slowly, you can get great results without getting drips all over you. The roll would not slip through the gap, so I had to unroll it to be able to pass it between the pipes. I'm working on a lift, so the tail could just dangle and not touch the ground. Anyway I was able to get at least five layers over the actual hole. It is like wrapping a mummy or an old style cast on an arm. After I got it wrapped, I changed gloves and did my best with the little thin strips of foil tape. I really think that is almost silly. It was barely long enough to really do anything and it will only stick to itself, and not to the wet "bandage". I wound up removing the tape after it cured. I started the engine and let it run for about 20 minutes and it was rock hard. With the location that it was, I could see it from behind the car, so after it cured for a couple of days, I gave it a coat of primer grey, so it would be less noticeable than the bright white under the car. I did the repair a couple of months ago and I have driven it a little over a hundred miles and it is still holding perfectly and sounds so much better than a leaky exhaust. And a repair like this was probably 30 times cheaper than replacing the exhaust on this car.

The repair itself worked well and covered my hole on my Toyota Sienna, so I can't complain about the effectiveness of the product. However, I am disappointed by the amount of wrap included. The package stated that it contained 72 inches of wrap. My exhaust pipe has a circumference of roughly 7 inches, and the instructions recommended applying about 5 layers while extending the wrap 2-4 inches beyond the damaged area on each side. Based on those measurements, I expected to have enough material for approximately 10 wraps around the pipe. Instead, one package only provided about 4 wraps. I had purchased a second package as a backup in case I found additional damage elsewhere under the vehicle, but I ended up needing it immediately just to complete the repair as instructed. Because I was working underneath the vehicle, I did not stop to stretch out and physically measure the wrap, so I cannot say with certainty that it was shorter than advertised. However, based on the circumference of the pipe and the number of wraps I was able to make, the amount of material seemed significantly less than the stated 72 inches. The repair worked, but the quantity included did not match my expectations, and I had to use a second package to complete a repair that I believe should have been possible with one.

This stuff works great on an old junker that you don't want to put much money into. Seals up the exhaust leak and so far has lasted over a year. Neighbors really appreciate how well it works at 4 in the morning!

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.

Never had much success with a “muffler bandage” in the past. JB Weld was the perfect repair on a curved pipe that rusted thru a welded hanger site when made. Recommend installing in smaller strips, when possible,to keep adhesive clean.

only few days is just crack

Only put it on a couple of days ago but so far so good. Was easy to wrap onto exhaust and cured very quickly.

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.

Worked as expected.