System Three 0900K46 Silvertip Epoxy Kit with Fast Hardener, 1.5 gallon, Clear Exceptionally fast wet-out of fiberglass and other reinforcing media Superior defoaming properties and little tendency to float fabric Cures without forming an amine blush with either the fast or slow hardener Cures exceptionally clear for bright finished applications 26 minutes (100g mixture) gel time at 77F (25C). 3 hours (100g mixture) tack free time thin film at 77F (25C)