Re: Fuel Tank Surprise

Posted by Owen_Dyneto On 2008/4/13 8:37:27

Though fuel pump diaphrams live and work in a tougher environment than your sending unit gasket, chemical resistance tables tell us that you should move away from the neo- and isoprene-type rubbers and towards Buna or perhaps nitrile rubbers. The old classic gasket material for gasoline service was of course cork coated with shellac, but ethanol is a solvent for shellac so that's no longer a good choice. However one of the Aviation gasket pastes is rated for alcohol service so as a chemist my choices for alcohol-doped gasoline would be buna rubber first, and cork with a suitable gasket cement second.