A penetrating, waterproofing UV screen (sunblock).  Conditions treated surfaces and has a very intense beautifying properties.  Non-hazardous and biodegradable.  303 ends buffing and waxing colored gelcoat fiberglass boats.  Use to protect synthetic and natural rubber from drying and cracking caused by UV Light.  Use on anodized aluminum.  The answer to the water spotting problems associated with stainless steel.