Bulletproof Glass — Ballistic Security Glass 12–50mm | MONTAG

Bulletproof glass — also referred to as ballistic glass, bullet-resistant glass, or armored glass — is a cutting-edge security glass engineered through a precise high-temperature and high-pressure compounding process. It integrates multiple layers of high-strength glass (tempered or float glass) with professional bulletproof films such as PVB (Polyvinyl Butyral) or SGP (SentryGlas Plus). This advanced composite structure delivers exceptional impact resistance and penetration resistance, capable of effectively withstanding bullet attacks of varying calibers while maintaining optimal light transmission. Unlike ordinary glass that shatters upon impact, ballistic glass maintains structural integrity, providing a reliable protective barrier for personnel and property.

MONTAG supplies bulletproof security glass in thicknesses from 12mm to 50mm, with customizable ballistic ratings from Class A (pistol-resistant) to Class C (rifle-resistant). Light transmittance ≥80%, anti-splash fragment retention. Serving construction contractors, security system integrators, commercial property developers, and special vehicle manufacturers worldwide.

Certified to applicable international standards — [view certificates](/about-us#certifications)

What Is Bulletproof Glass?

Bulletproof glass achieves its superior security performance through a sophisticated composite structure and rigorous manufacturing process. At its core, it consists of alternating layers of high-strength glass (either tempered glass or float glass) and high-performance bulletproof films, such as PVB or SGP. These components are bonded together under extreme high temperature (typically 120–150°C) and high pressure (1.0–1.5MPa), creating a unified, resilient structure where each layer plays a critical role in absorbing and dissipating impact energy. The glass layers provide rigidity and initial impact resistance, while the bulletproof films act as a flexible buffer, preventing fragmentation and stopping projectiles from penetrating.

A key characteristic of ballistic glass is its scalability in security levels: the number of layers and overall thickness directly correlate with its bulletproof capability. Basic models (2–3 glass layers + 1–2 film layers) with a thickness of 12–20mm can resist small-caliber handgun fire, while high-level security versions (5+ glass layers + 4+ film layers) with a thickness exceeding 40mm can withstand rifle rounds and even high-velocity projectiles. This flexibility allows for customization to meet specific security needs.

Key characteristics of bulletproof security glass:

• Multi-layer composite structure — glass and PVB/SGP films bonded under high temperature and pressure
• Scalable ballistic ratings — Class A (pistol), Class B (submachine gun), Class C (rifle)
• Anti-splash fragment retention — cracked glass fragments adhere to film, preventing splash injuries
• Light transmittance ≥80% — maintains clear visibility despite thick multi-layer construction
• Structural integrity after impact — protective barrier remains intact even when glass layers crack
• Long service life — high-quality PVB/SGP films resist aging, yellowing, and delamination for 10–15 years

Performance Specifications

These specifications translate directly to security outcomes: the multi-layer composite structure absorbs and dissipates bullet impact energy layer by layer, while the anti-splash film ensures that even cracked glass fragments remain firmly bonded — eliminating the risk of secondary injury from flying glass. For high-security B2B projects, the scalable ballistic rating system allows precise matching of protection level to threat assessment, avoiding both under-protection (security risk) and over-protection (unnecessary cost). At ≥80% light transmittance, armored glass maintains visual transparency essential for face-to-face interaction at bank counters and merchandise display at jewelry stores.

Ballistic Level Guide

Ballistic levels are based on industry-standard ratings. For projects requiring specific international certifications (UL 752, EN 1063, or NIJ standards), our technical team provides compliance verification and test reports. Contact us with your security assessment requirements for a customized ballistic level recommendation.

Safety Design Under Attack

One of the most notable advantages of bulletproof glass is its safety design when under attack. Unlike ordinary glass that shatters into sharp, dangerous shards, ballistic glass retains its fragment integrity — even when the glass layers crack, the fragments adhere tightly to the bulletproof film, eliminating the risk of splashing injuries to people behind the glass.

This anti-splash feature provides three critical safety benefits:

• Secondary Injury Prevention: Cracked glass fragments remain bonded to the PVB/SGP film, preventing flying glass from causing additional injuries to personnel behind the barrier.
• Structural Integrity Maintenance: The protective barrier remains intact even after bullet impact, preventing subsequent projectiles or physical intrusion from penetrating the opening.
• Emergency Response Time: By maintaining barrier integrity, the glass buys valuable time for emergency response, lockdown procedures, and personnel evacuation — critical in active threat scenarios.

For commercial venues with high passenger flow, this safety performance can effectively reduce post-accident losses and meet the strict safety operation standards of commercial projects.

Advantages Over Ordinary Security Glass

Compared with ordinary security glass (such as tempered glass or laminated glass), bulletproof glass offers distinct advantages:

• Vs. Tempered Glass: Tempered glass shatters into small blunt颗粒 on impact but cannot stop bullets or high-velocity projectiles. Bulletproof glass maintains performance even after multiple bullet impacts, with fragments retained by the film layer.
• Vs. Laminated Glass: Standard laminated glass (3+3mm or 5+5mm) provides basic safety and sound insulation but offers no ballistic protection. Bulletproof glass uses multiple thick glass layers and specialized PVB/SGP films engineered specifically for energy absorption and projectile stopping.
• Service Life: High-quality PVB/SGP films resist aging, yellowing, and delamination, ensuring reliable ballistic performance for 10–15 years under normal use — significantly longer than ordinary security glass.

Functional Upgrades & Integration

Bulletproof glass can be integrated with additional processing technologies to expand its functionality:

• Insulating Glass Integration: Combining ballistic glass with insulating glass layers achieves heat insulation and energy saving, suitable for exterior windows and facades requiring both security and thermal performance.
• Low-E Coating Integration: Adding low-emissivity (Low-E) coatings enhances UV resistance and reduces glare — ideal for display windows where merchandise protection and visibility are both important.
• Decorative Processing: Edge polishing, pattern etching, and custom shapes meet architectural aesthetic requirements for high-end commercial applications.
• Sound Insulation: The multi-layer structure inherently provides excellent sound insulation, beneficial for bank counters and conference rooms requiring acoustic privacy.

Customization Options

Beyond standard bulletproof glass, we offer:

• Custom ballistic level — tailored to project risk assessment and threat profile
• Non-standard size cutting — cut-to-size sheets for specific installation dimensions
• Special shape processing — curved, angled, or irregular geometries for architectural integration
• Functional film compounding — combining ballistic protection with sound insulation, UV filtering, or decorative interlayers
• Insulating/low-E integration — exterior-grade ballistic glass with thermal and solar control performance
• Custom edge processing — polished, beveled, or arrised edges to design specifications
• Armored vehicle specification — curved ballistic glass for vehicle windshields and windows

Applications

The application scope of bulletproof glass is extensive, covering all scenarios with high-security requirements:

• Financial institutions — bank counters, vault doors, ATM surrounds, cash handling areas
• Luxury retail — jewelry store windows, watch shop display cases, boutique sales counters
• Government and embassy — office buildings, embassies, law enforcement facilities, perimeter security
• High-end residential — villa windows and doors, luxury apartment entryways, celebrity residences
• Special vehicles — armored cars, police vehicles, cash transport trucks, diplomatic vehicles
• Critical infrastructure — data centers, utility control rooms, communication facilities

Project Examples:

Bank branch security upgrade — Class A bulletproof glass (20mm) for 15 counter positions across 5 branches, anti-splash fragment retention ensuring teller safety during face-to-face customer interaction.

Jewelry retail chain — Class B ballistic glass (28mm) for display windows across 20+ high-end boutique locations, combining merchandise visibility with armed robbery protection.

Embassy renovation — Class C bulletproof glass (45mm) for perimeter windows and entry doors, integrated with Low-E coating for energy efficiency and UV protection.

For applications requiring enhanced thermal insulation, bulletproof glass can be integrated with insulating glass units. For sound insulation needs, the multi-layer structure inherently provides excellent acoustic performance. See our laminated glass and insulating glass product lines for compatible base materials.

B2B Order Information

Installation & Maintenance

Proper installation and maintenance preserve the ballistic performance and longevity of bulletproof glass:

• Professional installation required — ballistic glass must be installed by certified security glazing professionals to ensure proper framing and sealing
• Frame compatibility — use reinforced steel or aluminum frames rated for the ballistic level; standard window frames are not suitable
• Sealant specification — use only neutral cure silicone sealants compatible with PVB/SGP interlayers; acidic sealants can degrade ballistic films
• Cleaning — use soft cloth and non-abrasive glass cleaner; avoid steel wool or scrapers that can damage the surface or edges
• Inspection schedule — for high-security installations, annual professional inspection is recommended to verify ballistic integrity
• Edge protection — exposed glass edges must be sealed to prevent moisture ingress that could degrade PVB/SGP interlayers over time
• For B2B clients, we provide on-site construction technical training and long-term product quality tracking

FAQ

What is the difference between bulletproof glass and laminated glass?

Standard laminated glass (typically 3+3mm to 8+8mm with PVB/SGP interlayers) provides basic safety — it holds fragments together when broken but cannot stop bullets. Bulletproof glass uses multiple thick glass layers (typically 12–50mm total thickness) with specialized ballistic-grade PVB or SGP films engineered for energy absorption and projectile stopping. The multi-layer structure is designed to absorb and dissipate bullet impact energy layer by layer. Bulletproof glass also undergoes rigorous ballistic testing to certified ratings (Class A/B/C, UL 752, EN 1063).

What ballistic level do I need for my application?

This depends on your threat assessment: Class A (12–20mm) resists pistol handguns — suitable for bank counters and retail security. Class B (20–30mm) resists submachine guns — suitable for jewelry stores and embassies. Class C (30–50mm+) resists rifle rounds — suitable for government buildings, military facilities, and armored vehicles. We recommend conducting a professional security assessment before selecting a ballistic level. Our technical team can provide recommendations based on your project risk profile.

Can bulletproof glass be cut or drilled after manufacturing?

No. All cutting, drilling, and edge processing must be completed during the manufacturing process before the high-temperature, high-pressure lamination. Any post-manufacturing cutting attempts will compromise the structural integrity and ballistic performance. Please provide final dimensions and processing requirements with your order — we complete all fabrication before lamination.

How thick is bulletproof glass?

Thickness varies by ballistic level: Class A (pistol-resistant) is typically 12–20mm, Class B (submachine gun-resistant) is 20–30mm, and Class C (rifle-resistant) is 30–50mm or more. The thickness is determined by the number of glass and film layers required to stop the specified threat. Thicker glass provides higher protection but reduces light transmittance and increases weight — our team helps balance protection level, visibility, and structural requirements.

Does bulletproof glass break when shot?

The glass layers in ballistic glass do crack when shot — this is part of the energy absorption mechanism. However, the critical difference is that the cracked fragments adhere firmly to the PVB/SGP film layer, preventing splash injuries and maintaining the protective barrier. The glass remains structurally intact even after multiple impacts, preventing penetration. This anti-splash fragment retention is the core safety feature that distinguishes bulletproof glass from ordinary glass.

What certifications are available?

Our bulletproof glass complies with ISO 9001 and CCC (China) standards. For international security projects, we can provide products tested to UL 752 (US), EN 1063 (Europe), and NIJ (US National Institute of Justice) standards upon request. Each shipment includes ballistic test reports and certificates. Products are suitable for security project acceptance in global markets. Contact us with your certification requirements.

Need a quote for your security project?

Send us your security assessment or project specifications — our team responds within 24 hours with pricing, lead time, and ballistic level recommendations.