Notice: This No-glue film is only for smooth glass.Can not fit to frosted glass or art glass.InstallationStep 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 Installation:1.A clean and smooth glass surface without any dust, fiber or any kind of texture is needed.2. The transparent back cover must be peeled off; otherwise, the film will fall off when the water is dry.3. Do not apply to the window frame. Cut off excessive edges after application if needed.4. The film may be a little tough and its adhesive effect will be impacted in winter. Solution: use hair dryer or warm water to soft it.