Looking at the EAA web site on alcohol proofing fiberglass wing tanks, several products are recommended, however, this one is highly recommended (see below), it is a slosh and cost about $30 a tank. Has anyone used it?




BILL HIRSCH ALCOHOL/ ETHANOL RESISTANT GAS
TANK SEALER (RED LABEL)



WHY IS BILL HIRSCH'S GAS TANK SEALER THE BEST ON THE MARKET?
IT IS BETTER BECAUSE IT SEALS HOLES AND SEAMS FAR BETTER THAN ANY OTHER SEALER. IT HAS GREATER STRENGTH AND AT THE SAME TIME HAS THE FLEXIBILITY THAT A PRODUCT OF THIS TYPE IS REQUIRED TO HAVE;
SOMETHING OTHER SEALERS DO NOT HAVE. IT IS A NON-POROUS COATING AND IS NOT AFFECTED BY ALCOHOL OR FUEL MOST FUEL ADDITIVES. IT WILL WORK ON ALL TYPES OF TANKS SUCH AS STEEL, ALUMINUM, GALVANIZED, & FIBERGLASS WHEREAS OTHER SEALERS WILL NOT WORK ON SOME OF THESE METALS . IT IS NOT A MOISTURE
CURED URETHANE PAINT THAT IS SOLD BY ONE U.S. COMPANY AS A GAS TANK SEALER. THEIR OWN ADVERTISING TELLS YOU THAT IT IS MOISTURE CURED AND THAT ONCE YOU OPEN THE CAN YOU CANNOT RE-USE IT. THIS TYPE OF SEALER, USUALLY A LIGHT GRAY OR SILVER WILL NOT STICK TO THE INTERIOR SURFACE OF MOST TANKS FOR VERY LONG AND GENERALLY 6-12 MONTHS LATER, WILL BREAK AWAY FROM THE INSIDE OF THE TANK AND WILL TURN INTO A FLOATING PLASTIC BAG INSIDE OF THE TANK. THAT TYPE OF ITEM WHILE BEING RESISTANT TO ALCOHOL WAS NEVER INTENDED TO BE A TANK SEALER AND SHOULD NEVER BE USED IN A FUEL TANK