Is window film bulletproof?

No, standard window film is not bulletproof. While it is often marketed as 'security film' or 'shatter-resistant film,' it is not designed to stop or even significantly slow down a bullet. Security film's primary purpose is to hold glass fragments together upon impact, which can delay a burglar's entry or prevent injuries from flying glass during a storm or explosion. Even the thickest security films (around 12-14 mils) do not have the density or multi-layered construction required to absorb the kinetic energy of a high-velocity projectile. A bullet will pass through a filmed window almost as easily as it would through plain glass, although the glass might not shatter and fall away as it normally would. To achieve true bullet resistance, you must install ballistic-rated glass, which utilize thick layers of polycarbonate and glass-clad materials. For those looking for the 'best of both worlds,' some systems combine ballistic glass with security film to provide both bullet resistance and fragment retention, but film alone should never be relied upon for ballistic protection.