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

I used this to repair a hole in a gas BBQ that had rusted through, and also to reattach a support for the flame tamer. It was easy to use and has worked very well.

Very strong and holds amazingly

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.

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.

Using the word "weld" implies some kind of tensile strength. This is no different to fire cement that you would seal around a flue with. It just crumbles to powder once it's dry. It may be ok as a filler but it does not weld anything. Don't imagine this is anything like a 2 part epoxy product.

Used on slight crack on exhaust manifold, followed instructions 100%. Lasted the first day took car out. And came off.....No good for use. Also remaining product in container no use , dried up so couldn't re do repair. Not fit for purpose.

I managed to shear the heads off the 2 bolts holding the EGR inlet pipe to the exhaust manifold on my Land Rover Disco when fitting a blanking kit. Managed to drill the upper bolt out and put an M6x35 bolt coated with some of this paste through with a nut on tight on the back but could not get a drill bit on to the lower one or get behind it. Used regular exhaust assembly paste between the plate and the manifold as a basic gasket and a small bead as far round as I could, let that set then piled on a generous amount of this paste to get it air tight and well sealed. That was 6 weeks ago and I have been checking it regularly and nothing has moved or cracked what so ever. Very happy that it saved me from pulling the manifold and having to drill and tap 2 new holes which would of been a pain & long job. It does give you a pretty good almost cold weld. This paste is seriously tough and sets like metal and is withstanding 600 degrees plus easily along with preventing any movement of the plate. Am very impressed and will no doubt find more uses for the rest of it now I know it is strong and withstands a lot of heat and vibration. It is far far superior to it's lower temp resistant J.B. Weld high heat paste and of course loads better than standard fire putty or exhaust paste which cracks easily with vibration and becomes quite brittle towards the top of its temp range.

This type of product is for people that have an old car that isn't worth pouring money into. My car almost got scrapped after its last MOT due to a catalytic converter exhaust leak, and cats are very expensive. Thankfully, this product did the trick and plugged the hole, allowing it to pass. Be careful though as it's fairly liquid and you'll need to be careful applying it. After it dried, I also covered it in a lot of gun gum to help it hold a bit better. Also note that this is by no means a permanent repair - the car will need a new catalytic converter at some point.... but not today. Excellent for a temporary quick fix... but your old car will get scrapped one day anyways!

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.

Je roule depuis plus de 2 ans avec un trou dans le bloc moteur de ma golf 2 colmaté avec JB WELD !

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.