A faster method for filling all types of dings on Polyester Surfboards, especially larger voids where foam needs to be replaced. Sun Cure® Ultra White Filler resin is used straight from the bottle, no mixing or adding q-cell needed. Our proven formula is very UV stable and provides a permanent repair. A polyester top sealer coat is suggested after the white filler has been sanded. Not for Epoxy Repairs. Cures within 5 minutes then is ready for easy sanding.