In the security industry, there is no margin for error. When “almost” is the difference between a kinetic stop and a fatality, the terminology we use must be as precise as the engineering we deploy.
Today, American schools are being sold a dangerous compromise: the assertion that multi-layered window film constitutes a viable ballistic solution. This claim is not only technically inaccurate—it is a catastrophic failure of safety standards that puts lives at risk.
“Almost” is not a security grade. It is a liability.”
– Peter Fabian CEO Advanced Coatings Engineering LLC.
The Technical Failure of Kinetic Dissipation
True ballistic resistance, as codified by NIJ (National Institute of Justice) 0108.01 and UL 752 standards, requires a material to successfully dissipate the total kinetic energy ((1/2 mv^2)) of a projectile and prevent perforation. Multi-layered window film—regardless of whether it utilizes 6, 10, or 15 layers—lacks the molecular density and interlaminar shear strength required to achieve this.
When a high-velocity round strikes film-coated glass, the material’s failure is predictable:
- Negligible Retardation: Window film is designed for spall reduction and fragment retention. While it holds fractured glass in place, it offers statistically insignificant resistance to the projectile’s velocity.
- Lethal Trajectory: A product that permits bullet passage is, by definition, not ballistic-resistant. In a tactical environment, calling a glorified adhesive “bullet-resistant” because it prevents a shooter from physically stepping through a shattered frame is a lethal misnomer. A bullet does not need a door to be open to kill; it only needs a path.
The “Active Shooter Resistant” Myth
Marketing terms like “Active Shooter Resistant” are frequently manufactured to bypass stringent ASTM and UL ballistic testing requirements. These demonstrations are theatrical, showing windows remaining “intact” after multiple rounds. However, this is a visual sleight of hand. While the film maintains the structural integrity of the glass pane (preventing entry), the ballistic integrity is zero.
Allowing bullets to perforate a classroom barrier under the guise of “protection” is a surrender of our duty of care. We are essentially telling educators and students that their safety is secondary to a cheaper, “almost-as-good-as” alternative.
Americans Deserve Definitive Protection
At Advanced Coatings Engineering LLC, we have pioneered the world’s most advanced defensive technologies. We should not have to settle for “delayed entry” when the requirement is “ballistic stop.” There is a fundamental difference between a deterrent and a shield.
If a material cannot meet UL 752 Level 3 or higher, it has no business being marketed in the context of ballistic defense. We must demand a return to rigorous, data-driven security standards. Our schools deserve certified ballistic glass and framing systems—engineered solutions that stop the threat at the perimeter, rather than letting it pass through.
Read the full story at The Wall Street Journal.
Performance Gap: UL 752 Level Comparison
The UL 752 Standard for Bullet-Resisting Equipment is the benchmark for certifying ballistic resistance in building materials. Unlike window films, which often lack third-party ballistic certification, Advanced Coatings Engineering LLC., is engineered to stop specific threats.
UL 752 Standards vs. Window Film Performance
| Rating | Ammunition | Projectile Weight | Velocity (fps) | Multi-Layered Film Performance |
|---|---|---|---|---|
| Level 1 | 9mm FMJ | 124 grain | 1,175–1,293 | FAIL: Immediate Perforation |
| Level 2 | .357 Magnum JSP | 158 grain | 1,250–1,375 | FAIL: Immediate Perforation |
| Level 3 | .44 Magnum SWC | 240 grain | 1,350–1,485 | FAIL: Immediate Perforation |
| Level 4 | .30-06 (Soft Point) | 180 grain | 2,540–2,794 | FAIL: Immediate Perforation |
Advanced Coatings Engineering
At Advanced Coatings Engineering, we have developed a suite of glass protection technologies, covering the full spectrum of threats to buildings, vehicles and windows, from aggressive forced entry, to threats from gunfire, bombs and improvised explosive devices.
We specialize in retrofitting glass and windows which are already in place, meaning we simplify your design, engineering and construction process.
For more information, contact us at info@usace.com.
