Final coat resin, cures when exposed to air.An improved, professional-quality surfacing resin for use as a final coat on fiberglass layups. Free flows to fill cracks and gaps. Applies more easily than thick resins. Cures tack free. Hardener included.Key featuresNo-sag polester resinMay be used on softwoods and fiberglassIdeal repair for hulls, decks and cabinsSpecifications Formulation: Polyester surfacing resin Recommended Usage: Final coat resin; cures when exposed to air Cure Time: 4 hrs. Recoat Time: 30 minutes