The Problem With Window Film

Security window film is an increasingly popular solution that schools are investing in for their security concerns. While window film is cost-effective and may slow an intruder, it is currently being sold to schools under false pretenses, once again emphasizing the importance of certification and UL752 listing.

The Importance of Listing

In all cases, we recommend validating the performance of window film or consulting a security expert. This can be done by cross-referencing the product’s certifications with the listing database. The UL, NIJ, and ASTM databases can be found here.

Independent Laboratory Tests Outside of These National Directories

It is common to see companies use 3rd party labs to test their products, outside of UL, NIJ, or ASTM testing. While these tests may be considered the “equivalent” in terms of a film's performance, the customer should do due diligence to research the manufacturer, and the lab and communicate with the lab directly to verify these results. We do not recommend products that have been self-tested/manufacturer-tested only.

In all cases, whether it be through the national directories linked above, or through a 3rd party lab, Mayday recommends validating the performance of any film product.

Why Window Film Is Not Considered Bullet-Resistant

Many film companies do independent testing or 3rd party testing they consider equivalent to the UL standards (UL752 is the gold standard in bullet-resistant certification) and then assign these certifications to their product, without ever being listed in the UL database.

Window Film Combined With a Ballistic Barrier Window Shade

Window film does a good job of protecting against intruders and minimizing the impact of weather-related events. A layered approach using both window film and Ballistic Barrier window curtains or shades creates an effective strategy for “barrier resistance” as we call it.