Pyro-Putty 2400

I used this "miracle" putty to the T per the instructions and it didn't hold up. I used it on a cast heat exchanger on a hot water boiler. For $49.00 you'd think it would have worked at least for a few days, NOPE.

Cures to something hard enough to drill and tap, and stands up to high temps. There are better products to exhaust manifolds (which can be too hot for this stuff), but great for nearly everything else.

I used it on the exhaust manifold and the flex connection. It held up for about 10 days, after that it is back to same. I believe it is due to extreme temperature variation (hot and cold) and vibration, the patch cracks and falls off.

Would buy again

Used it on my wood boiler furnace on a small split it did not hold, as soon as I charger boiler with water it bled right thru

used on an exhaust manifold

Great stuff and great service.