BDF PRBL Window Film Premium Color High Heat Control and Daytime Privacy Blue (36in X 14ft) VIBRANT BLUE SHADE that is perfect for giving your windows a modern look with a luxurious finish. Silver side faces in, and the blue side faces out. EXCELLENT HEAT REJECTION that helps reduce cooling costs especially during the summer with effective blocking of harmful solar rays. NOT RECOMMENDED for DUAL PANE WINDOWS. 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. This is installed on the interior side of the 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. BE AWARE, as the name suggests, the privacy-effect works during DAYTIME only! The side exposed to the most light will produce a more reflectiveappearance. Therefore, the privacy-effect will become reversed at night since the interior will be exposed to more light than the exterior. Window film is to be applied on the inside of your window (again, NOT RECOMMENDED FOR DUAL PANE). Perfect for living arrangements where you want to prevent nosy people from looking through your window during the day while maintaining exposure to sunlight but have curtains or blinds to use at night.