What are ballistic Protection standards for bullet resistant glass
There are 8 different bulletproof levels for glass; however, it should be noted that no product is technically bulletproof. The materials are simply bullet resistant. This means they can withstand different types of ballistic projectiles without shattering or allowing bullets to travel trough the galls at full speed.
Understanding UL 752 Ballistic Protection Standards
Understanding what bullet resistant glass can be confusing with all the different names, and products out there. Understanding the different ballistic standards that are used to measure the level of protection the product provides. Below you will find some information and understanding of what a UL 752 levels means.
UL 752 Requires absolute protection
All products that have been tested and certified to meet the standards of the level must meet absolute protection from that type of ballistic threat. If there is any break created by an impact, that product would not qualify for an UL 752 standard at that level.
Not all UL 752 Ballistic Standard ratings are the same
When thinking about the rating system, you would assume that the numbers correspond to the level of protection or benefit that is offered. Level 1 would be the lowest, level 2 would be the next, and so on. But that is not the case for UL 752 ratings.
Only levels 1 through 3 are lineal. So, if something is tested to UL level 3 it would automatically meet the standards for UL levels 1 and 2. However once you get to level 4 the standards vary. Take for example something being tested for level 8 it doesn’t mean that it would automatically meet the standards for a level 7.
Understand UL 752 Bullet Resistant Levels
Each level requires the material to withstand impact from a specific type of ballistic impact. Below you will find the testing requirements for all the levels:
| Levels | Requirements |
| UL 752 Level 1 | Provides protection against three shots of a 124-grain 9mm full metal copper jacket with lead core at an fps between1175 and 1293 |
| UL 752 Level 2 | Provides protection against three shots of a 158-grain .357 magnum jacketed lead soft point at an fps between 1250 and 1375 |
| UL 752 Level 3 | Provides protection against three shots of a 240-grain 44 Magnum Lead Semi-Wadcutter Gas Checked at an fps between 1350 and 1485 |
| UL 752 Level 4 | Provides protection against one shot of a 180-grain .30 caliber rifle lead core soft point at a fps between 2540 and 2794 |
| UL 752 Level 5 | Provides protection against one shot of a 150-grain 7.62mm rifle lead core full metal copper jacket military ball (.308 caliber) at an fps between 2750 and 3025 |
| UL 752 Level 6 | Provides protection against five shots of a 124-grain 9mm full metal copper jacket with lead core at an fps between 1400 and 1540 |
| UL 752 Level 7 | Provides protection against five shots of a 55-grain 5.56mm rifle full metal copper jacket with lead core (.223 caliber) at an fps between 3080 and 3383 |
| UL 752 Level 8 | Provides protection against five shots of a 150-grain 7.62mm rifle lead core full metal copper jacket military ball (.308 caliber) at an fps between 2750 and 302 |
| Shotgun | Provides protection against three shots of a 12-gauge rifled lead slug at an fps between 1585 and 1744 and three shots of a 12-gauge 00 buckshot (12 pellets) at an fps between 1200 and 1320 |
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