The grey Jeffco product you're referring to is their #9700 and is the material that seals the tanks of the entire Lancair fleet.  You can see the specs at http://www.aerocraftparts.com/ItemForm.aspx?item=9700-1G&Category=992b7b06-e01b-4918-bb0c-79343cdb7869

   <Marv>


"Christopher Barber" <CBarber@TexasAttorney.net> wrote:

 And on this note, what does the collective know about the gray Jeffco
 product that is purported to be for use in fuel applications?  This is what
 my tanks are lined in.
 
 All the best,
 
 Chris