Its really meant for a hole in an exhaust pipe. You put it on and the heat activates the hardener and the tape becomes rock solid while bonding to the metal. Includes one 2' x 72' repair wrap, a pair of gloves, and aluminum tape. Theres really no 'sealing' it or repairing it. But after a few minutes the Permatex Ultra Copper started smoking at the joint between the header and the adapter. ExhaustWeld Total Exhaust Repair Wrap is a high strength fiberglass wrap, impregnated with a specially formulated resin for high temperature resistant repairs. The exhaust sounded a bit different and I found no leaks. I just started the Savage up and let it idle for a bit while I tried to check for leaks. I bought tube of the Ultra Copper, cleaned off the Ultra black well, and assembled the exhaust system with the Ultra Copper. It's supposed to work on exhaust manifolds up to 600 degrees F. 2-pouch bonus pack. Seals out fumes at temperatures up to 2000degreesF (1000degreesC). So I did some research and found that the Ultra Copper is the most heat resistant. Permanently repairs holes and leaks in exhaust systems. I tried some Ultra Black that I had on hand. As far as smell goes, every time you raise the temperature at the mufflers a few degrees, the paint on the underside of your car will start to smell until. It didn't seem to seal very well and got so hard that it started breaking off.Īfter reading here that several people sealed the muffle to exhaust joint with Permatex, I thought I'd give it a try.

I first tried sealing it with 'muffler paste' I found in a auto parts store. I have a Dyna muffler installed with a short adapter pipe from a local muffler shop.

Exhaust putty odor