It's SPF-40 sunscreen, good for your gear. 303's protective formula is designed to slow or stop ultraviolet damage. This water-based formula protects and restores color to gel coat, skin coat and Royalex hulls. Essential for boats stored outside. 303 works well on plastics, vinyl, and fabrics; use it wherever you need to protect valuable paddling and outdoor gear from UV damage. 8 oz. bottle $9 16 oz. bottle $15