Bullet Resistant Film vs Bullet Resistant Glass: The Dangerous Myth Putting Occupants at Risk

In recent years, schools, houses of worship, government facilities, and commercial buildings have spent hundreds of millions of dollars attempting to improve security. Unfortunately, much of that money has been directed toward products marketed as "bullet resistant film," "ballistic film," or "bulletproof window film."

The problem?

There is no such thing as a UL 752-listed bullet resistant security film applied to existing glass.

While security film may offer benefits such as glass retention and delayed forced entry, it is fundamentally different from a tested bullet resistant glazing system.

Unfortunately, many building owners have been led to believe otherwise.

The Wall Street Journal Investigation

In December 2024, the Wall Street Journal published an extensive investigation titled "Schools Squander Millions to 'Bulletproof' Windows. It Doesn't Work." The investigation found that school districts across the United States had spent more than $100 million on security film products that were marketed or perceived as providing ballistic protection. The article reported that major window film manufacturers acknowledged their products do not stop bullets and that some demonstrations used to sell these products relied on testing methods that did not accurately represent real-world school conditions.

The investigation also highlighted concerns regarding demonstrations that utilized thicker glass, different glass types, or testing conditions that differed significantly from the glazing systems installed in most schools. According to industry experts interviewed by the Wall Street Journal, these demonstrations could create unrealistic expectations regarding actual performance during an attack.

Security Film Is Not Bullet Resistant

Perhaps the most important statement in this entire discussion comes from the window film industry itself.

The International Window Film Association has stated that security film installed on standard glazing should not be represented as a bullet-resistant product. Industry manufacturers have similarly stated that their films are not designed to stop bullets.

Security film can:

• Hold broken glass together

• Reduce flying glass fragments

• Delay certain forced-entry attacks

• Improve blast and impact performance in some applications

  
  

Security film cannot:

• Achieve UL 752 ballistic ratings

• Transform standard annealed or tempered glass into bullet resistant glass

• Provide the same level of protection as a tested ballistic glazing system

Those are critical distinctions when lives are at stake.

The Problem With Self-Created Testing Standards

One of the more troubling findings from the Wall Street Journal investigation involved the use of testing organizations and standards that were created, controlled, or heavily influenced by the same companies selling the products. The investigation reported instances where testing entities and certification organizations shared common ownership or affiliations with product manufacturers, raising questions about independence and transparency.

When evaluating any security product, building owners should ask:

• Was testing performed by an independent third-party laboratory?

• Was the entire system tested?

• Was testing conducted under a recognized standard?

• Can the manufacturer provide official test reports?

• Has the product been tested using the same glass and framing system being specified?

If the answer is unclear, buyers should proceed cautiously.

A False Sense of Security Can Be More Dangerous Than No Security

The greatest danger may not be the product itself.

The greatest danger is believing you are protected when you are not.

When school administrators, architects, security consultants, or building owners are told that existing glass can be transformed into a bullet resistant barrier by applying a thin film, security decisions may be made based on assumptions that do not match actual performance.

Several industry experts interviewed by the Wall Street Journal expressed concern that schools were making security plans around ballistic protection that did not actually exist.

When an attack occurs, occupants deserve protection based on verified performance, not marketing claims.

What True Bullet Resistant Glass Looks Like

A genuine bullet resistant glazing system is engineered and tested to recognized ballistic standards such as UL 752.

These systems typically include:

• Ballistic glazing

• Ballistic framing

• Ballistic doors

• Ballistic hardware

• Tested anchorage systems

Most importantly, they are independently tested to stop specific threats ranging from handguns to high-powered rifles.

A tested ballistic system is designed to stop bullets.

Security film is designed to hold glass together.

Those are not the same objective.

The Bottom Line

Security film can play a role in delaying forced entry and improving glass retention. However, building owners should never confuse security film with bullet resistant glass.

The Wall Street Journal's investigation exposed serious concerns about misleading ballistic claims, questionable testing practices, and the growing gap between marketing and actual performance. The result is that many facilities may believe they have purchased ballistic protection when they have not.

When protecting schools, government buildings, houses of worship, and commercial facilities, the standard should be simple:

Demand independent testing. Demand recognized standards. Demand proven performance.

Because when lives depend on a security system, "close enough" is not enough.

Frequently Asked Questions

Is security film bullet resistant?

No. Standard security film applied to existing glass is not bullet resistant glass and should not be relied on to stop bullets.

Can window security film stop bullets?

Security film is generally designed to hold broken glass together and delay forced entry. It is not a replacement for UL 752 tested bullet resistant glass.

What is the difference between security film and bullet resistant glass?

Security film is applied to existing glass and mainly helps with glass retention. Bullet resistant glass is engineered and tested to stop specific firearm threats.

What is UL 752?

UL 752 is a recognized ballistic testing standard used to evaluate bullet resistant materials and systems against specific firearm threats.

Why does third-party testing matter?

Third-party testing helps verify that a product performs under recognized, repeatable conditions rather than relying on marketing demonstrations or company-controlled tests.

Is a shooting demonstration the same as UL 752 testing?

No. A shooting demonstration may not follow recognized standards. UL 752 testing controls ammunition, distance, shot placement, number of rounds, and pass/fail criteria.

Does bullet resistant glass need a ballistic frame?

Yes. The glass, frame, anchors, and hardware all matter. A ballistic glass panel installed in a non-ballistic frame may not create a bullet resistant opening.

Can security film be part of a security plan?

Yes. Security film can help with glass retention and forced-entry delay, but it should not be confused with bullet resistant protection.

What should schools use for firearm protection?

Schools should evaluate UL 752 tested bullet resistant glazing systems, including the glass, frame, anchorage, doors, and hardware.

What should architects specify for bullet resistant openings?

Architects should specify complete tested bullet resistant systems, not just individual glass or film products.