303 is THE LEADER in UV screening technology. 303 Aerospace Protectant really is like "SPF 40 Sunscreen...For Your Stuff." Regular use gives 100% prevention of UV caused slow-fade with regular use. Because of its enduring cosmetic properties, the resistance of 303-treated surfaces to dust, soiling, and staining, its water repellent and unparalleled protective characteristics, manufacturers worldwide recommend 303 Aerospace Protectant. 32 oz trigger spray.