TV report: disc film as burglary protection

Yesterday I saw a report on the TV, where one showed that a later applied special foil on the side panes offers better burglary protection. There are already tinting foils, or is there actually also colourless?! Do the actually same or similar effect, that if a disc is struck, this does not collapse immediately? Although I still think that the car manufacturer should try to make a considerably break-proof car h to create, it would be a good idea to additionally secure the car with such a foil…