BDF HS35 Window Film Energy Saving and Heat Control, Silver (Medium) - 36in X 50ft Effective Heat and Sun Control Properties 99% UV Rejection! Block harmful UV rays. Reduces fading on furnishings caused by the sun. Highly Reflective Medium Shade Offers Excellent Daytime Privacy Metallized manufacturing process for our most cost effective heat control window film. Professional adhesive material and film that can last many years. Scratch resistant coating