Marine 31 T-Top Fabric Protectant with SunBlock Formulated using SunBlock technology  a fusion of Marine 31s proprietary UV absorbers and advanced Ciba Tinuvin UV Blockers Treated surfaces will retain their color and texture while repelling dirt, dust, oil, grease, acid rain, salt, insects and bird droppings. Regularly treated surfaces will resist UV-induced fading, cracking and discoloring. This CFC-free formula meets Californias strict air quality standards.