Fast Gloss is a reactive silicone sealant and polish that chemically bonds to the spa finish, leaving a hard, protective coat. Waterproofs and seals and leaves a long-lasting finish. Fast Gloss is an incredible new, state-of-the-art sealer, polish and cleaner made from reactive silicones (amino functional fluids). These reactive silicones actually bond chemically and become a part of the spa finish. Fast Gloss meets the performance requirements of today — durability, depth of gloss, water repellency, easier buffing and easier application without streaking or smearing. The protective coat, unaffected by sunlight, temperature or chemicals, will last up to 6 months on your spa and up to one year on your car and RV. Excellent for fiberglass and acrylic spas and all water slides.