Glass film is ideal for windows, glass walls, and doors, frosted glass film can add a layer of privacy while still allowing natural sunlight to illuminate rooms. Frosted glass film is a popular choice for both interior partitions and exterior windows. Window film is a thin laminate film that can be installed to the interior or exterior of glass surfaces in automobiles and boats and also to the interior or exterior of glass in homes and buildings. It is usually made from polyethylene terephthalate (PET), a thermoplastic polymer resin of the polyester family, due to its clarity, tensile strength, dimensional stability, and ability to accept a variety of surface-applied or embedded treatments.