Solarez Epoxy Microlite Filler 1oz It is a white putty made of high-strength UV-Cure resin and super lightweight additives that effectively repair ALL TYPES OF SURFBOARD FOAM, including Styrofoam. This putty cures in roughly 3 minutes by exposure to sunlight or artificial UV light. It sands and fairs very nicely, making it an easy one-step repair for almost any ding. 1oz