Recently I have had a problem with the burner kicking back when I try to light it. It's a little unnerving to say the least. I keep one hand on the valve at the tank to close it instantly. I decided to clean the whole burner. I removed the burner assembly and completely disassembled it. The "neck" of the unit was attached to the bottom of the burner itself. I removed the two bolts and found a type of seal between the two. Looked like some type of asbestos gasket material and was light in color. I have cleaned all this off, wire brushed both surfaces and I am going to clean these parts in PBW. My question is this, anyone know what type of high temperature gasket material or compound I might use to put these back together after this cleaning process. (I have had a few boil overs in my 50 some brews). LOL Any help will be appreciated.