Unlike many other quick-curing epoxies, EPOXO 88 is not rubbery or overly flexible after curing. It makes great fillets! Long shelf life, unopened up to 5 years. Multiple marine application-fiberglass repair-seals tanks-hoses-repair batteries-fills dents in aluminum, steel, and other metals-used by major airlines for aircraft repair-glues surfaces in 15 minutes with 1500 lbs. tensile strength-fast setting epoxy compound.sets in 6 minutes-high impact strength-strong adhesion to:urethane-fiberglass-metal-foam-glass-wood,etc.