Unfortunately I don't have the name or any un-used product as the small 3 oz
unit required that it all be mixed. You can do a goggle search and look for
"aviation fuel tank sealant" you will find a lot but look at products like
Naftoseal MC-236-B or from a company called, aviation Products find their
listing of CS-3201 or CS 3204. Get the paste not the flowable liquid, paste
is indicated by suffix "B'. I am hardly conversant in aviation stuff, as I
understand it, a lot of aircraft have tanks that routinely require internal
inspection, so sealing them back up is done often. Hence, there are lots of
products for this. So your local airport, even if it is small ,will have or
will know some aircraft mechanics who will know all about this stuff and
likely have it on hand. When I spoke to a parts guy at our little aircraft
company, he knew exactly what I was talking about.
good luck

--
Ron White
my boatbuilding web site is:
www.concentric.net/~knotreel