Window films are thin and strong laminated sheets that are fitted onto either side of a glass window. Their self-adhesive property makes the installation process easy. They are usually made of Polyethylene Terephthalate, a kind of thermoplastic polyester. The films serve many purposes beyond providing a decorative look to your building. They act as insulators by regulating the amount of heat passing through the windows, therefore, protecting your furniture and fittings from sun damage.