Notice: This No-glue film is only for smooth glass.Can not fit to frosted glass or art glass. Installation: Step 1. Measure windows and trim film; Step 2. Clean glass, then wet glass with soapy water(or just clear water also work well); Step 3. Affix taps on both sides to remove the transparent backing film.( which is a kind of clear vinyl, please MAKE SURE remove it before you apply the window film to glass); Step 4. Apply to wet glass and smooth with a smooth tool,such as a credit card or a spatula,or hands; Step 5. Squeegee away water and air bubbles; Step 6. Cut off the margins. Tips for you: 1.When applying in cold weather: before installation, blow hot air to the film using a hair dryer to soften the film up (Heat Resistant up to 176 Degree F) 2.Affix a tape on a corner of the back side (the smooth side) to quickly remove the backing film. 3.Do not apply to outside window or windows with cracks. 4.More efficient in teamwork.