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. No other "protectant" beautifies as intensely, protects as powerfully or lasts as long. Originally engineered for aerospace and aviation applications, 303® Aerospace Protectant™ is a premium surface treatment that provides superior protection against harmful UV rays that cause discoloration, fading, embrittlement, cracking, chalking and/or loss of mechanical properties.