HS fiberglass armor panels offered by Strongwell are developed for ballistics resistance. Specially constructed glass reinforcements in a proprietary resin matrix are used to assemble the panels and then, the panel components are cured in a controlled cycle.
When struck by a bullet or other projectile, HS Armor panels delaminate in a way that absorbs the energy and stops the projectile. Thousands of these panels have been procured by the US Military to help safeguard the troops in Iraq.
The ply delamination process of energy absorption is illustrated in the photo to the left. Three .44 magnum bullets are totally encapsulated by the fiberglass panel to meet UL 752 Level 3 and NIJ Level 3A specifications.
HS fiberglass armor panels have been independently tested to UL 752 and NIJ (National Institute of Justice) Ballistics Specifications and surpassed all of these requirements. Please refer the below table for the classifications of panels complying with UL 752 and NIJ requirements.
Common Applications
The following are the common applications of the HS Armor panels:
- Jury boxes
- Judge benches
- Bank teller areas
- Convenience stores
- Storm shelters
- Panic rooms and safe rooms
Fiberglass HS Armor Fabrication and Installation
Ordinary carpenter's tools can be used to cut and drill HS Armor panels. It is recommended to use a carbide "grit edge" blade for cutting. High speed drill bits are recommended to be used at slow speeds when drilling. Panels can be easily installed using screws, bolts, or industrial grade adhesive.
Testing and Requirements
Strongwell HS Armor panels are independently tested for compliance to the following specification requirements on a regular basis. The panels listed below were tested for UL 752 Level 3 with a .44 Magnum Pistol.
NIJ and UL requirements |
Panel Thickness (in.) |
Armor Type |
Weapon |
Ammunition |
Velocity (ft/sec.) |
Weight (psf) |
.250 |
UL Level 1 |
9 mm Pistol |
124gr. FMJ |
1175 - 1295 |
2.51 |
.40 |
UL Level 2 |
.357 Magnum Pistol |
158gr. JSP |
1250 - 1375 |
4.10 |
.50 |
UL Level 3 |
.44 Magnum Pistol |
240gr. Lead |
1350 - 1485 |
5.10 |
.156 |
NIJ Level 1 |
22 LRHV |
40gr. Lead |
1050 ± 40 |
1.59 |
38 Special RN |
158gr. Lead |
850 ± 50 |
1.59 |
.3125 |
NIJ Level 2A |
.357 Magnum Pistol |
158gr. JSP |
1250 ± 50 |
3.19 |
9 mm Pistol |
124gr. FMJ |
1090 ± 40 |
3.19 |
.40 |
NIJ Level 2 |
.357 Magnum Pistol |
158gr. JSP |
1395 ± 50 |
4.10 |
9 mm Pistol |
124gr. FMJ |
1175 ± 40 |
4.10 |
.50 |
NIJ Level 3A |
.44 Magnum Pistol |
240gr. SWC Gas |
1400 ± 50 |
5.10 |
9 mm Pistol |
124gr. FMJ |
1400 ± 50 |
5.10 |
FMJ - Full Metal Jacket
JSP - Jacketed Soft Point
SWC - Semi-Wadcutter
LRHV - Long Rifle High Velocity
RN - Round Nose
This information has been sourced, reviewed and adapted from materials provided by Strongwell Corporation.
For more information on this source, please visit Strongwell Corporation.