J-B Weld 8297 HighHeat Temperature Resistant Epoxy Putty Stick, Machine Gray, 2oz

Worked well in cylinder head

I found this very easy to use due ro easy instructions, as you only the amount required for use to be applied. Like the instructions say you have to knead the putty like working dough between your hands so that the outer darker area of is mixed with the inner lighter part of the putty to activate it before applyito to the surface area, but you must prepare the surface to with some sandpaper and clean it to make sure the putty has good surface to work with in the end. Once done it states it takes 8hrs for it to completely cure meaning you can even drill or sand it afterwards, if need be.I did find the i was able to shape it to plug the hole in pipe while while smearing it around the pipe, as to make sure it worked like a bandage to prevent tye potential of exhaust’s gas pressure being able to blow it anytime in the future. I wore rubber gloves while applying the putty with my hands which made it a lot easier to work seeing it can dry within 2hrs which means you can tell its just starting to thicken a little while still being mailable to continue shaping to surface area meantime.Remember, its up to 2hrs to drying but 8hrs to completely cure before being able to drill or sand it.

Had a small hole in our hall radiator. I was skeptical to tell the truth. Hallelujah, it actually worked. Sealed the hole, no problem. Over a year now since I did the repair. Still no leak. Once the putty sets, it goes rock hard. Handy stuff to have in the tool box.Highly recommended..

Used it to tidy up my welding on my exhaust it sets rock hard even without heat, easier to mix without gloves as long as you use plenty soap & water will use again if i get a stripped thread as it can be drilled & tapped. Delivery quick 48 hours.

Good condition and good quality

It says that this can be used on radiators, but it didn't work for me.My radiator is curved and it had a hole on one of the welds. I bled the rad and tried this product. After 48 hours, I re-pressurised the system. It worked for a short while, but then began to leak. I may try again and submit another review if it works, but for now - it doesn't work on radiators

Did the job that it was required to do, would recommend

All good on time sealed the exhaust