Great for fiberglass and sheet metal ding repairsFiberglass filler with long strand reinforcing fibers for fiberglass and sheet metal repairs. Water-resistant. Hardener included. Great for quick and easy ding repair on fibergalss surfboards, sailboards, canoes and runabouts. Formulation: Polyester putty Recommended Usage: Fiberglass and sheet metal repairs Color: White Quantity: Quart