Perforated Window Film (Window Perf) opens a new world of promotional opportunities by turning glass doors and various types of windows into prime advertising space. Applied to the outside of your window, Window Perf is an adhesive-backed, perforated synthetic substrate with full color printing on one side that is designed to let you put your printed message on a window visible from the outside but still be able to see out from the inside. You can use it on architectural glass and side or rear automotive windows. For automotive use, please check local regulations before applying.