UV SunBlock is designed to help prevent the fading of colors and the degradation that can result when fiber surfaces are exposed to the sun's damaging ultra-violet rays. Ideal for a wide range of applications: drapes, tapestries, rugs, carpets, patio furniture, upholstery, sheers, clothing, auto interiors, and more. Treated surfaces retain color vibrancy and maintain a new appearance longer. UV SunBlock is perfect for use on indoor and outdoor surfaces, and is effective on natural, synthetic, and blended fibers.