Designed to keep intruders out and prevent smash-and-grab burglary, DefenseLite is a patented security glazing system manufactured by Impact Security LLC. This retrofit security shield is designed to mount onto the existing glazing to transform windows and doors into impenetrable openings that are 250 times stronger than glass alone. DefenseLite is not an applied security film but rather a heavy-gauge architectural-grade polycarbonate and extruded framing system. The surface of the polycarbonate is UV-coated to protect against scratching, graffiti and other factors that may result in the degradation of the material. The bullet-resistant version of DefenseLite, BulletShield, is independently tested to provide UL 752 ballistic ratings. BulletShield can be installed over existing glass from the interior or exterior.