HIDBEA blackout film offers full privacy and blocks any undesirable views. It's 100% light proof and Non-Adhesive. Rejects infrared heat from the sun, anti-glare, as well as block out UV rays which damage furnishings over time. Eliminates hot spots, which allows for a more consistent temperature in all areas of your business. 1. Cut the pieces of film so they measure about 2-3cm larger than the window panes being covered. 2. Peel off the transparent back side of the film. 3. Generously spray enough water/dish washing liquid mix with water onto the window surface. The water makes it easier to position the film and helps hold it on the window. 4. Apply from top to bottom, for large size window, two people is recommended. 5. Use squeegee to push the bubbles out. We have installation kit for sale. 6. Trim the extra film. Tips: 1. Newspaper or waste paper is ideal to remove tiny spots on window surface, these spots will create bubbles on your finishing. 2. Generously spray dish washing liquid water onto the exposed back side of the film makes the separation easier. 3. Be sure the window is dripping wet, if it becomes dry, rewet it completely before applying film. 4. Apply in early morning or late evening when the glass is cooler to avoid Bubbles/spots. 5. Please make sure to leave 2mm (0. 08 inches) gap between the film and the window frame since there are sealant glue or painting residue left on the corner. When heat expands, the film will easily fell off.