In direct terms, window films contain a powerless, strong sheet of polyester cover that is treated in a party of approaches to making due, directing, organizing, controlling , dealing with the look or execution of existing windows when applied. Constantly, the film is applied to the inside surface of existing windows as a retrofit. To fitly adhere to the glass, one side of the film has a paste that bonds the film to the glass surface and the opposite side has a scratch-safe covering for strength.