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Does Security Window Film Meet Astm F3561 Level 3 Requirements?

by | Jul 9, 2026

Yes, security window film can meet ASTM F3561 Level 3 requirements, but it generally requires a specific combination of high-performance materials and professional installation techniques.

To achieve the Level 3 benchmark—which requires resisting a forced entry attempt for 180 seconds (3 minutes) using tools like a sledgehammer—the following components are typically necessary:

  • Film Thickness: Heavier films, typically expressed in the 12 to 24 mil range or multi-ply laminates, are required to provide the necessary tear resistance and energy absorption.
  • Impact Protection Attachment Systems: Film alone is often insufficient because the entire glazing unit can be pushed out of the frame. Level 3 compliance usually requires:
  • Wet Glaze (Structural Silicone): This bonds the filmed glass to the frame, adding significantly to the breach delay.
  • Mechanical Anchoring: Using metal clips or retainers to physically lock the glazing into the opening is the most robust method and often exceeds Level 3 requirements.

Important Safety Note: It is critical to remember that while these systems provide significant delay against forced entry, security window film is NOT bullet-resistant and should not be relied upon for ballistic protection.

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