I have used vinyl ester resin to make attachments to epoxy parts; vinyl ester resin will bond to cured epoxy. Epoxy resin will not bond to cured vinyl ester. Keep in mind which got there first when you do family resin overlays. Vinyl ester resin when promoted has about a 2-month shelf life; keep it in the refrigerator and you may get 6-months shelf life; don't let it freeze. Vendors, like Aircraft Spruce, will not sell you un-promoted vinyl ester resin. The promoter chemicals are nasty and have a high liability risk for vendors. Ethanol in automotive fuel will absorb water from the air. Ethanol when saturated with water at about a 6-percent solution makes a fair solvent for cured epoxy and vinyl ester resins. Recommend you do not use automotive fuel containing ethanol in epoxy or vinyl ester fuel tanks. Using 100 LL aviation gasoline will work ok with either cured epoxy or vinyl ester resins.
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA ---------------------------------------------------------------------- Has anyone tried to make a lay up with vinylester resin over cured epoxy resin (West System)? ?As in a fuel tanks.? I??want to make my front deck with out the header tank so I can start on my canopy. ?I don't want to buy the vinylest resin untill I start on the wing tanks so I can do all tanks together. ?So I don't have to worried about the resin getting old. Paul Visk Belleville Il. 618-406-4705 ------------------------------
