J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey

Great high-temperature repair paste! Easy to apply and sets firmly, creating a strong heat-resistant bond. Perfect for exhausts, engines, and other high-heat repairs. Once cured, it holds up really well—excellent value and reliability.

Absolutely brilliant product, saved me a lot of money by gluing a supporting leg back onto the grate for my wood burner

Used it to seal a hole in a silencer box about the size of a penny. Not ideal as it was on the lower face of the box. Held in place with tape after application whilst curing. Winter application so curing took more than 24 hours. The seal held but the repair ballooned. Still in place but not an invisible repair. Useful as an interim repair.

It was exactly what I wanted.

I needed to repair the back of my oven. The screws that held the fan cover in place had fallen out as the holes had rusted. This seemed the ideal thing to do the job but I am afraid it just didn't work for this particular project. It did harden up but just fell out when I tried to drill through it and hadn't really adhered to anything. I think this is probably best when used thickly, more as a gap filler than to create a workable surface.

Used to fix pretty big hole in exhaust for Mot. Pros: easy to apply with an old ice cream stick. Can be applied by hand and washes out easily. Cons: took several layers of application to plug the hole. First application had cracks through it after driving letting exhaust out so reapplied and reapplied and reapplied until it was totally covered. Also as I was applying this upwards, it does flow whilst drying so I had some minor jbweld stalactites. Had to keep smoothening it until it hardened. Overall, key is to apply in layers for large holes. So far seems to be holding, although we haven't driven much. Gut feeling is on long drives it will crack but good enough to get through mot. See pic for the size of hole I plugged. Would recommend as a temporary fix until you can get something more permanent.

I wasn't expecting much, but JB delivered. No solvents, great repair to my exhaust silencer. Top marks.

I used this to repair the steel hood on an old Tilley storm lantern. It's right at the end of this products temperature range so I was doubtful if it would work, but after 14 hours of running it's still holding up fine.

kanon

Amazing result. Used on an old gas oven door. Unable to get parts to repair handle but this product did the trick. Very pleased.

I bought it to fill the gap developed in high pressure vessel..it is very good and handy in such situations..highly recommend.

Reparer un coude d’echapement sur un bateau le temps d’avoir la piece de rechange.

This glued me and my wifes marriage back together