Bulletproof glass is a generic term we give to glass that is strong enough to resist being penetrated when it is struck with an object, including bullets fired from guns. The term bullet proof is a bit of a misnomer as “bullet resistant” would be a more accurate term. This material is used in a wide variety of applications where security and safety are of paramount concern.
Bulletproof glass can be found in a wide range of applications where protection, security and safety are of primary consideration. Banks, government buildings, jewelry stores and other places where money or valuables need protection are some of the most common commercial applications. The military depends heavily on bulletproof glass for protection in vehicles and as part of many weapons. One of the most visible examples of bulletproof glass in a transport vehicle is the glass bubble that covers the “Popemobile” while another bulletproof bubble is famous for the fact that it was absent from the roof of the limousine carrying President John Kennedy when he was assassinated.
Bulletproof glass is an important and valuable safety tool. It offers protection without reducing visibility in a wide range of situations. That said, there are a few drawbacks to Bulletproof glass. Bulletproof glass that contains a polycarbonate will eventually degrade if it is exposed to solvents or UV radiation and will also become increasingly brittle as a function of time. At temperatures below -7⁰ C a direct hit on the polycarbonate material will create fragments that can become projectiles themselves. Lastly, the thicker Bulletproof glass panels will partially block light, creating a darker looking panel.