J-B Weld8297 HighHeat 500 Degree Epoxy Putty Stick - 2 oz. , Grey

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.

Great Product at a Nice Price - Thank You

A Must have to use around the house 3-5 min sets up. Rock Hard.another one that's High heat. It takes about an hour to set.also a water weld. Its just ok to me. I fixed a radiator leak with the onethat sets fast.

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.

Made a custom exhaust and heat shield, and after grinding out the welds I needed some putty to fill in some gaps, but it needed to handle the high heat a motorcycle exhaust system faces. This stuff was the exact thing I needed and it's held up very well. I used it for functional filling but also for some cosmetic detail work, it was easy to shape and dries ultra-hard so you can sand it to perfection.

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.

I had the repair a plastic refrigerator fan housing that had broken when replacing the fan and motor. This stuff enabled me to rebuild the housing in places that had disintegrated due to heat plus hold everything together well. I was skeptical it would work but after letting it cure over night I found the housing to be stronger than it was originally. The heat resistance is needed for this application so am very pleased with that too—the housing is better than new. Highly recommend.

it worked like a charm. would definitely buy this again in the future.