Permatex Super 300. It's a dark brown, almost black thick liquid sealer that was developed in WW II for use around aviation gasoline. It's a much better sealer than the light brown Permatex 3-D brush-on stuff. It can be a little hard to find at times, but it's worth the search. A 4-ounce bottle will last a very long time.
Jerry

http://www.permatex.com/products/Au...atex_Super_300_Form-A-Gasket_Sealant.htm



Last edited by Hotrod Lincoln; 04/27/2011 4:37 AM.
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