Safety & Security Window Film: What It Does and How to Choose the Right Thickness

Direct Answer

Safety film and security film are commonly used terms for protective window films designed to help hold broken glass together; they do not make glass unbreakable. The level and type of protection depend on the film thickness, existing glass, frame, installation method and, for certain security applications, the perimeter attachment system. The Window Place USA directly supplies 4, 7, and 8 Mil Clear safety/security films. Heavier 10, 11, and 14 Mil Armorcoat configurations are installer-only.

Key Takeaways

• Safety/security window film helps retain fractured glass and reduce hazardous flying or sharp fragments from accidental breaks, consistent with applicable safety-glazing requirements.
• Protection level depends on the application. Film thickness, the existing glass, the frame, and the installation configuration all matter; for certain forced-entry or higher-security applications, the perimeter attachment system can be critical.
• The attachment system matters as much as the film itself. Without a proper perimeter attachment (such as wet-glazed structural silicone or mechanical anchoring), even a thick security film can be pushed out of the frame under sustained force.
• No film — regardless of thickness — should be described as "bulletproof," "unbreakable," or "impenetrable." Recognized testing standards (ASTM F1233, ASTM F1642, GSA-TS01-2003) measure resistance and delay for a tested assembly under specific test conditions, not permanent invulnerability.
• Product availability: The Window Place USA directly supplies Solar Gard 4 Mil Clear, 7 Mil Clear, and 8 Mil Clear as orderable safety/security film products. For higher-security applications requiring heavier Armorcoat configurations (10/11/14 mil), professional installation through an appropriate installer is required — these configurations are not available as a direct purchase through The Window Place USA.

Detailed Explanation

Safety film, security film, and safety/security film are commonly used terms for protective polyester (PET) window films applied to glass with a pressure-sensitive adhesive. The practical distinctions are based on thickness, intended application, glass type, film-and-glass configuration, framing, perimeter attachment system where applicable, and tested complete-system performance required for the project.

For accidental glass breakage (e.g., a door impact, a dropped object, or storm debris), safety/security film is used to help hold fractured glass together in a sheet rather than allowing fragments to scatter, which can reduce the risk of laceration injuries. Film thickness and applicable safety-glazing requirements matter.

For intentional forced-entry attempts (break-ins, riot/vandalism scenarios), safety/security film may be one component of a complete tested glazing system — glass, film, frame, and perimeter attachment together. Forced-entry and blast-mitigation applications should be evaluated against the applicable tested system standards, not attributed to film alone.

For applications requiring heavier-gauge security performance, Solar Gard's Armorcoat line (10/11/14 mil configurations) is engineered for higher-security and blast-mitigation-oriented applications. These heavier configurations require professional installation through an appropriate installer and are not sold as a direct, supply-only purchase through The Window Place USA.

Technical Factors

• Film thickness (mil): The Window Place USA directly supplies 4, 7, and 8 mil "Clear" configurations as orderable products. Heavier Armorcoat configurations (10/11/14 mil) exist for higher-security applications but require professional installation through an appropriate installer rather than direct purchase from The Window Place USA.
• Perimeter attachment system: Wet-glazing (structural silicone bead bonding the film edge to the frame) or mechanical anchoring systems are frequently required to achieve documented forced-entry or blast-mitigation performance for a tested assembly — the film alone, unattached at the edge, will not achieve the same tested result. This is a primary reason heavier Armorcoat configurations require professional installation rather than direct supply-only purchase.
• Testing standards:
• ANSI Z97.1 — impact-resistance testing relevant to basic safety glazing (100-lb soft-body impactor; Class A/B drop-height ratings).
• ASTM F1233 — Standard Test Method for Security Glazing Materials and Systems (evaluates a glazing system against tool attack, ballistic, and forced-entry test scenarios).
• ASTM F1642 — blast-loading test methodology for glazing systems.
• GSA-TS01-2003 — GSA blast-hazard rating standard for glazing systems, rating outcomes from "No Hazard" to higher hazard levels based on fragment behavior after a blast simulation.
• Fragment retention is the shared mechanism behind both product categories — the film's adhesive bond to the glass keeps broken pieces from becoming airborne fragments, which is the basis for injury reduction in both safety and security contexts.

Product Application

The Window Place USA directly supplies Solar Gard 4 Mil Clear, 7 Mil Clear, and 8 Mil Clear as its safety/security film products available for direct order. These should be positioned according to the specific threat level and application (residential, commercial, or government) and any required compliance standard for the project — not by default to the thickest available option.

For higher-security applications requiring heavier Armorcoat configurations (10/11/14 mil), professional installation through an appropriate installer is required. The Window Place USA does not sell these heavier configurations as a direct, supply-only purchase; buyers with higher-security or blast-mitigation-level requirements should contact The Window Place USA for product guidance.

Limitations / What Buyers Need to Know

• Never described as "bulletproof," "burglar-proof," "unbreakable," or "impenetrable." These terms are not accurate descriptions of how any glazing film performs, regardless of thickness.
• Film performance figures are only meaningful in the context of the complete tested assembly — the glass type, the film, the frame, and the attachment system together. A high-mil film installed without proper perimeter attachment will not perform to its tested rating.
• Specifying "shatterproof" in a project specification is discouraged, since it is not a recognized technical or regulatory term; specifications should instead cite the applicable ASTM/GSA standard and required performance level.
• Buyers seeking a specific compliance level (e.g., GSA blast mitigation) should request third-party test documentation for the specific tested assembly, not the film alone.
• 10/11/14 mil Armorcoat configurations are not available for direct purchase from The Window Place USA and require professional installation through an appropriate installer.

Safety & Security Film — Application Considerations

Frequently Asked Questions

Does security film make glass unbreakable?

No. Safety/security film helps hold glass together when it is broken, which can delay or deter forced entry as part of a tested glazing system, but no film makes glass unbreakable.

What thickness of security film do I need?

It depends on the specific threat level and application. The Window Place USA directly supplies 4, 7, and 8 mil Clear configurations. For higher-security applications requiring heavier Armorcoat configurations (10/11/14 mil), professional installation through an appropriate installer is required — contact The Window Place USA for guidance.

Is safety film the same as security film?

Safety film and security film are commonly used terms for the same general family of protective window films. The appropriate product and installation path depend on the application, film thickness, glass, frame, installation configuration, and whether a tested complete system with perimeter attachment is required.

Do I need a special installation method for security film?

Often yes. Higher-performance forced-entry and blast-mitigation ratings for a tested assembly typically depend on a perimeter attachment system (wet-glazing or mechanical anchoring), not just the film itself. This is why heavier Armorcoat configurations (10/11/14 mil) require professional installation rather than direct supply-only purchase.