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Bullet Resistant Glass

Bullet-resistant glass is a term for glass that is particularly resistant to being penetrated when struck by bullets. Bullet-resistant glass is usually constructed by using layers of laminated glass.

The use of interlayers provides impact-resistance, such as physical assault with a hammer, an axe, etc. The interlayer provides little in the way of bullet-resistance. The glass, which is much harder that the interlayer, flattens the bullet and thereby prevents penetration. This type of bullet resistant glass is usually 28-78mm thick and is heavy, which requires specialized steel.

Category

Thickness

Glass make-up (with 0.38mm interlayers)

Rating

GA

28mm

4+10+10+3*

9mm Parabellum

GB

38mm

4+10+10+10+3*

357 Magnum

GC

53mm

4+12+12+10+10+3*

44 Magnum

RA

53mm

4+12+12+10+10+3*

R4 Rifle

RB

78mm

(6 x 12)+3*

R1 Rifle

* The 3mm glass is placed to the inside when fitted which reduces spalling.

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