The insulation film fits to the window with the self-adhesive tape supplied. the film is then tightened by applying heat with a hair dryer. Fitting instructions: Step 1 Clean the window film with white spirits. Step 2. Apply the double-sided tape around a window or door to be insulated, leaving no gaps, and press Insulation Film onto the tape. Step 3. With an ordinary blow dryer to hand, warm the entire surface of the Window Insulation Film and in moments, creases and wrinkles will disappear. Step 4. To tidy up, trim-off all surplus film at the edges with a craft knife or scissors, ensuring that the window frame is not scratched or marked insulation film;fixing tape.