GL: fiberglass tanks and ethanol

[bob Austin]

Dave is correct that some epoxies do not fair at all well with ethanol, or
ethanol gas mixtures (usually 85/15).  I should have been a bit more specific
and noted that an ethanol resistant epoxy should be used.  These are readilly
available.  The "studies" by Boat US, and a individual boat builder used "off
the shelf" epoxies--and many, including the West Systems do not do well with
ethanol.

However there are specific formulated epoxies (remember that epoxy is a class
of compounds) which are very resistant to both concentrated ethanol and 15%
ethanol/85% gasoline.

  Definately obtain one of the specifically formulated epoxies which is
resistant to Ethanol.  One example is Enviroline 125U-  There are a number of
other similar products.  This come with a "gasoline/gasohol resistance, 100%
methanol and ehtanol resistance."  There are specific chemical characteristics
which make some of the epoxies resistant and others not resistant to ethanol.

Regards,

Bob Austin