303 Protectant is the most powerful UV-screening protection ever developed. It really is like 'SPF 40 sunscreen ... for your stuff'. It cleans surfaces, protects them from harmful UV rays, and maintains the integrity and tear strength of nylon materials, rubber compounds and vinyls. It will not coat gear with a waxy residue and it's biodegradable. Regular use gives 100% prevention of UV caused slow-fade. Because of its enduring cosmetic properties, the resistance of 303-treated surfaces to dust, soiling, and staining, its water repellency, and unparalleled protective characteristics, manufacturers worldwide recommend 303 Aerospace Protectant.