Keep your fabrics looking new by treating with Ray Bloc UV Fabric Protector. Helps prevent costly UV damage and fading to fabrics caused by UVA and UVB sun exposure. Ray Bloc is a water-based UV fabric protector that is formulated to extend the life of fabrics found in patio furniture, awnings, tents, canopies, cushions, covers and more. Ray Bloc is also safe for use indoors on items such as furniture, curtains, rugs and carpeting.