J-B Weld 8297 HighHeat 500 Degree Epoxy Putty Stick - 2 oz. , Grey

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!

This was awesome, I used it on a metal outdoor firepit and it is still holding up. Easy to mix, sets up quickly and works like a charm Dried hard as iron and I'm certain you could easily drill a hole in it same as iron. 100% impressed and satisfied

Worked perfectly on several small holes and rusted seams on a car muffler. Most poor reviews are probably due to a lack of surface preparation. I used a wire wheel on a drill to prep surface to bare metal, cleaned with alcohol, mixed product thoroughly and had no problems. Several months later repair holding up fine.

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.

This is pretty solid stuff. I was pulling the differential carrier out of my 1993 K1500 to have the Eaton G80 locker rebuilt. I noticed the magnet on the diff cover was broken off in the bottom of the housing. I bought a new magnet but wasn't sure what to adhere it with. I took some sand paper and scuffed up the area I was adhering. I put this epoxy on it and used clamps to clamp it as tight as I could. About 500 miles after the rebuild I took the cover off to flush the break in metals out and the magnet was still on there solid.

Although I haven't used it yet I've used this before and it worked great I'm sure it'll be just like last time

I'm a fan of JB Weld, and maybe I was asking too much of this product, but I was still disappointed. I used this to mate an exhaust together using a sleeve over both sides, so the JB Weld really only needed to hold the sleeve in place.. but it cracked and broke. It did dry up pretty quickly, and was very hard. Maybe a bit too hard, as the crack may have been from a shock while it was warm that it just didn't like. This was right at the end of the tailpipe and the beginning of the muffler, so not at the manifold, past the resonator, so it certainly gets hot, but not outside of the range that this product claims to be good for. I just don't think it was the right application for this product, though it sorta seemed like an ideal use for it. I had better luck with those wet-n-wrap epoxy cloth kits in this specific scenario. I specifically made an effort to keep the stress on the area as low as possible by using a coupling pipe between the two, but the JB Weld High Heat just wasn't up to the task. At least it wasn't a goopy nasty mess like the resin cloth stuff.. that stuff was nasty to work with. This stuff was much neater and cleaner, but for this use case, just couldn't do the job. I still love ya, JB Weld, but this one was a little underwhelming.

wow. best thing ever. i dont know how i am going to remove this when the time comes.... but i will deal with it then lol. this thing works when NOTHINGGG else works. I use this for a couple of different things, certain switches (again the wall) or extension cords again an upward surface. 3M velcro adhesion only for for a short period of time because the heat from the extension cord will loosen the adhesive then the extension cord will begin to fall/tilt. the clear,thick adhesions do the same thing. This high heat epoxy thing turns into rock hard and doesn't melt. I use some blue/green tape to hold it up for 12-24 hours or longer and then once i remove the tape, the extension cord will not budge. like i said, i dont know how i am going to remove it... but i will deal with it then. highly recommend. I need to try this on something outside lol

Does what it says on the tin, had a small puncture hole in my sump, sealed it no leaks

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.