Permatex Super 300. It was developed in WW II for sealing parts exposed to aviation gasoline, and it's MUCH better than the old brown Permatex #3. Both of them come in the bottle with the brush built into the cap, but Super 300 is a little thicker, and almost black in color. Brush on a light coat of the liquid sealer on either the gasket or the mating surface of the metal, and bolt everything up. The sealer stays semi-flexible for about 3 days past forever! Clean up with lacquer thinner or spray carb cleaner if necessary- - - -other solvents don't cut it very well.
Jerry
