J-B Weld HighHeat

Subaru outback with the fake dual exhaust. It rots where the two pipes come together. I shoved an entire stick of this into the gap as tight as I could go and the leak is fixed. The pipe had a big hole in it. It only worked because it's contained on three sides but it worked for $6 I'll take it.

My old charcoal grill had a small crack leaking smoke, and I didn’t want to buy a whole new unit. I picked this J-B Weld HighHeat epoxy putty stick. Kneading it by hand was simple, then pressed it into the crack. After full curing, it handles up to 500 degrees. I’ve grilled many times since; the patch stays solid with no melting or cracking. The grey color blends well. A handy DIY solution that saved me money on replacement.

This stuff really does harden like steel, and it does it pretty quickly, so have a plan and move fast once you start working with it. My exhaust flange had completely rusted out and split in half, so I bought an exhaust flange repair bracket and packed this putty all around the repair, including on the threads of the bracket. Once it hardened, that was it. Ain't no way this thing is coming off now. 😅 It was easy to work with, stayed where I put it, and gets seriously hard once cured. Just don't take your sweet time getting everything into position because it starts hardening pretty fast. For a rusty exhaust repair where I wanted everything locked together and sealed up, it worked exactly how I hoped.

I had a dime sized rotted spot on the families mini van muffler that was becoming increasingly loud. I decided to use this product to see if it would plug the hole and quiet the vehicle down some . The goal was not a long term fix, just one that would allow me to push off the $500 visit to the shop for another month or two. After cleaning out the hole and surrounding rust, I found I now had a walnut sized hole to fill. Furthermore, the inside of the muffler was filled with wet rusted metal flakes. I became skeptical that the product would work for this application but was fully committed at that point. The product mixed and installed as expected. I used it in two layers, the first (1/2 stick) was tucked into the hole with emphasis on getting some putty inside and behind the edges of the hole so it would grab and not blow out. The next application (2 hrs later) filled the void completely . ( This took about 3/4 of the epoxy stick in total). I allowed it to rest overnight . When I started the van the next day, it still had a rumble (from the internal rotting of the mufflers baffles) but it was significantly quieter. It's been a week now and it seems to be holding up just fine. The van will go in for a proper repair next month but this was a good stop gap measure that was well worth the hour and funds invested.

Sealed my small exhaust leak on the manifold. So far so good for a few months now and I got my inspection sticker 👍

Wow this worked for me.

Sets up hard as a rock, will stick to itself. As for it's uses it burned and cracked on my exhaust it's not rated hot enough for anything near the engine and I wouldn't use it for half the things it claims. Stinks really bad when it burns I don't recommend breathing it in. If you need this for anything you think is gonna be hot go for the higher temp one JB weld makes it as well. This is a good adhesive brand overall. This one just didn't do the job I needed it to.

This stuff is great! I just used it to patch a cracked exhaust on our Toyota Corolla. I was about to invest 300 and parts plus an hour or two in labor. But when I inspected the exhaust closely from the Cadillac converter all the way back to the muffler. I noticed almost everything was in pretty good shape other than the one spot where there was a hairline fracture. Right after the joint, headed towards the muffler. On a whim, I decided to check on here to see what they had for muffler repair because I hadn’t been pleased with the local advanced auto had on the shelves. I found this and the JB weld muffler repair. I bought both, but I ended up going with this because I thought for my particular situation this would be the best. I’m glad I did. It was really easy to use. I prepped the area by wire brushing around the crack. And then using a rag with isopropyl alcohol to clean before applying. Wasn’t sure how much to use, but I put on a pair of latex gloves and cut approximately half the product to use. I mixed it with my hands while wearing the gloves until it was a uniform color and then I applied it to the crack all the way around the muffler. It was easy to apply and mold into the shape I wanted. It was only like 40° outside, so I propped up a heat gun from a distance and let that hit it for about an hour. After that, I didn’t start the car until the next morning but when I did, it sounded perfect again! So far I’m really happy. I haven’t driven the car much yet so I will keep the review updated. But so far I’m very pleased and hopeful based on other reviews. In my case, I would rate this an incredible value for the money!

Product delivery than schedule but it look old and dusty.

i used this in my power steering pump and it stopped the leak, heat proof and durable. 100% recommended.

Hål i avgasröret på min bil. Bilen blev godkänd på besiktningen. Jag rekommenderar detta.

Très bon produit.

商品届きましたが１度開封されていて、周りをセロハンテープでとめてありました。台紙も破れておりセロハンテープで補修されている状態の物でした！！ 返品交換出来ないとされており最悪です！！中身はいつの物か分かりません。古い物は使い物にならない場合があります！最悪です！