The Sun Cure fiberfill 3.75 oz. tube provides a quick and permanent fix for small to medium sized dings. Sun Cure is a pre-mixed polyester resin that contains chopped fiberglass for added strength and longevity of the repair. Prep and apply Sun Cure in the shade, then move the board into direct sunlight and allow 5 minutes for the repair to cure. Resin can be applied in any temperature and, once cured, sands and paints easily. All resin based products have an approximate shelf life of 6 months at 77 degree room temperature.