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.

high heat or not it worked on an exhaust leak for a short period before dissappearing. it worked well enough cant complain

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.

Fast delivery and great product

I am lucky enough (unlucky enough) to own several German imported cars. One recurring problem on these cars is the exhaust system and the flex pipes, which have tried my patience and my welding skill. I can do a pretty good weld around about 90 percent of the joint, but cannot get my MIG welder into a tiny area between the pipe and the chassis. Over the years I have learned to do the welds that I can reach, and for the last bit, use this high heat putty to seal the system perfectly. I start with a cold engine, start it for a couple of minutes to feel the pulsations of the leak, shut off the engine, mix up the putty (I use the whole tube for coverage), make a ribbon about a half inch in diameter and about 4 inches long, then push it down over the leak, and finish with a wet finger to make a smooth seal. Let it cure for 24 hours and the leak is fixed permanently. Don't try to do it on a hot exhaust or while the engine is running. Be patient and your exhaust will sound like you are a professional exhaust welder!

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.

So I bought this to use for a different purpose. I was hoping it would work.I have several outdoor umbrellas and the “tilt” feature broke, so I could not get them to stay straight up. I thought and thought about how I could fix them since I did not want to just throw them out, they are only a few weeks old. I came across this item and thought, why not, let’s give it a shot.I was intrigued for the fact that this could withstand high heat and since the umbrellas are outside in Nevada sun, that would be beneficial.I cut one in half, since I didn’t need a whole lot to wrap, so I could use the other half on a second umbrella. I could have honestly cut it even smaller but I didn’t know who this worked.It goes on like a simple piece of tape, but once it cured, wow, it was as strong as metal and noting is moving.I am so happy I found this. Now I have to order one more since I only cut this one in half. Oh well, I’m just happy I don’t not have to throw my umbrellas in the trash.Highly recommend

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.