I had a muffler leak where the gasket goes and I didnt have access to a gasket. So I took it off and shaved all the old gasket material off and took some sand paper and sanded both surfaces clean. Then I took some dynamite RC cleaner and sprayed the surfaces clean to remove all oil and sand gritt around the contact point. I then bought some high temp RTV gasket maker and smeared a small amount on both conecting points and then screwed them together as tight as i can and cleaned off all excess. I havent ran it yet to see if it leaks yet.