BDF NA35 Window Film Sun Control and Heat Rejection N35, Black (Medium) - 36in X 12ft MILDLY DARK, BLACK FINISH that provides minimal view-shielding for situations that require less privacy, making it ideal for heat control while letting in a lot of light. EXCELLENT HEAT REJECTION. Helps reduce cooling costs especially during the summer through effective blocking of harmful solar rays. Also, minimizes fading on furnishings caused by the sun. STRONG ADHESIVES to last many years. For easier installation, remember to use A LOT of soap/water mixture to soak both the adhesive side and window. HIGH QUALITY PERFORMANCE films that are sensitive by nature. Please remember to take caution when handling the film as the slightest fold will create a permanent wrinkle. FREE TOOLS AND EASY INSTALLATION GUIDE to make installation DIY-friendly. Make sure window surface is completely clean and absolutely free of any blemishes. The black color gives the window a classic, tinted look. Ideal for rooms that require less view shielding but can use a little shade. Window film is to be applied on the inside of your window unless specified otherwise. Perfect for rooms that desire a lot of sunlight exposure with adequate heat control.