I use Permatex Super 300. It's a black brush-on liquid that was originally made for use around aviation gasoline. It's a much better sealant than the light brown 3-H Permatex liquid. Lots of listings on Ebay.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!