Tony,
For the motorcycle fuel tank, this is the sealer to use:
I have 6 vintage BSA's. 5 of them have fiberglass tanks. All
are sealed with the Caswell material. Have had no problems with any of
them; either the tank or the sealer. Preparing the inside of the tank
is the biggy, so that the sealer hooks up good.
Don't believe that I would use it in my Lancair fuel tanks
though.
The answer to the ethanol problem is obviously not to use it. Use
avgas and non-ethanol mogas. Here in this area, the commercial
card-lock fuel stations carry non-ethanol premium mogas.
Gary Edwards
LNC2
On a similar subject.... I had restored a 1972 Norton Commando
Interstate motorcycle with an original fiberglass tank. I sealed the
tank with the same epoxy coating that we use to seal our fuel tank in the
wings. After about three months of use with the automotive fuel which
contains Ethanol, i noticed the paint was starting to bubble from the outside
and the paint was discoloring. Upon further inspection, all of the epoxy
sealant had started to come apart completely inside the tank. Upon
further discussions with the engineers at the factory, they all verified that
the ethanol in the fuel is the best material if you want to delaminate your
fuel sealant........
Tony Moradian Legacy L2K330
N444HL