303 is the leader in UV screening technology. Regular use helps to protect against harmful UV rays that cause discolouration, fading, embrittlement, cracking, chalking. Treated surfaces repel dirt, soiling, staining, water spots, salt water and mildew. Use on rubber, vinyl, inflatable boats, plastics/acrylics/polycarbonates, finished leather, gelcoat fiberglass, carbon-fiber/resin composites, pool and patio plastic furniture, pool inflatables Etc.