Types of Bulletproof Glass

Executive Summary

Bullet-resistant “glass” is not one material but four main families: laminated polycarbonate, glass-clad polycarbonate, laminated (all-glass) glazing, and bullet-resistant acrylic. Each balances weight, clarity, scratch resistance, cost, and where it can be used. Polycarbonate is the lightest and best at multi-hit and forced-entry resistance; glass-clad polycarbonate marries a hard glass face to a polycarbonate core for durable exterior use; all-glass laminate is heavy but very clear and durable; acrylic is a low-cost interior option for lower threat levels. All are rated to UL 752. Armortex manufactures all four families, tested to UL 752 Levels 1–10.

Quick Facts

Material	Weight	Best use	UL 752 range (typical)
Laminated polycarbonate	Lightest	Interior barriers, retrofits, school vestibules	Levels 1–3 (Armortex TP series)
Glass-clad polycarbonate	Heavy	Exterior, high-security	Up to Level 8 + .30 cal AP
Laminated (all-glass)	Heaviest	Exterior, high-clarity	Up to Level 8
Acrylic	Moderate	Budget interior windows	Lower levels

What Are the Types of Bulletproof Glass?

The term “bulletproof glass” covers several transparent ballistic materials that stop or capture projectiles by combining hard and soft layers. The four families differ in composition — pure layered plastic (polycarbonate, acrylic), pure bonded glass, or a hybrid glass/polycarbonate laminate — and those differences drive weight, clarity, durability, cost, and suitability for interior versus exterior openings.

Why the Material Choice Matters

The material determines whether an assembly is light enough for a retrofit, durable enough for weather exposure, scratch-resistant enough for a high-touch counter, and clear enough for the sightlines a space needs — all while meeting the required UL 752 level. Picking the wrong family can mean an over-weight assembly, a scratched interior window, or premature exterior degradation, even when the ballistic level is technically met.

The Four Main Types

1. Laminated Polycarbonate

Polycarbonate is the lightest ballistic glazing and absorbs energy by flexing rather than shattering, giving it strong multi-hit and forced-entry performance. Armortex’s laminated-polycarbonate products (TP 100, TP 200, TP 300) cover UL 752 Levels 1–3 and can be UL Listed as no-spall or low-spall. As a reference point, TP 200 is approximately 1.00 inch thick and about 6.4 lb/sq ft (confirm exact dimensions and weights with Armortex, since they vary by level and make-up).

• Advantages: lightest weight, excellent forced-entry and multi-hit resistance, easy to cut and fabricate, no/low-spall options.
• Limitations: the bare surface scratches easily and requires an abrasion-resistant hard coat; generally interior use.
• Best applications: interior barriers and retrofits where weight is a constraint — schools, government service windows, banks, police stations.

2. Glass-Clad Polycarbonate

A composite that bonds a hard glass face to an energy-absorbing polycarbonate core. It combines the scratch resistance and optical clarity of glass with the stopping power and multi-hit performance of polycarbonate.

• Advantages: durable, scratch-resistant glass surface; excellent high-threat and exterior performance; long service life.
• Limitations: heavier and higher cost than polycarbonate alone.
• Best applications: exterior and high-security openings — courthouse and government façades, embassies, military installations. Available to higher levels, including 30-caliber armor-piercing configurations.

3. Laminated (All-Glass) Glazing

Multiple glass plies bonded with interlayers. Very clear and durable, but the heaviest option.

• Advantages: high optical clarity, durable, scratch-resistant surface.
• Limitations: heaviest; requires robust framing and anchorage.
• Best applications: high-clarity, high-security exterior openings where weight can be accommodated.

4. Bullet-Resistant Acrylic

A monolithic cast plastic glazing used for lower-level bullet resistance.

• Advantages: lower cost; single-layer simplicity; good clarity.
• Limitations: lower protection levels only; more prone to scratching than glass.
• Best applications: budget-conscious interior service windows at lower threat levels.

How Each Type Works

All four rely on distributing and absorbing a bullet’s energy. Glass and glass-clad faces are hard, deforming and flattening the round on impact; polycarbonate and acrylic layers then flex and stretch to absorb the remaining energy and capture the projectile and fragments. Glass-clad polycarbonate is engineered to get the best of both: a hard glass strike face plus a tough polycarbonate backing. Regardless of material, the glazing must be installed in a frame rated to the same UL 752 level to perform.

Benefits by Priority

Priority	Best material
Lowest weight	Laminated polycarbonate
Multi-hit / forced entry	Laminated polycarbonate
Exterior durability	Glass-clad polycarbonate
Maximum clarity, high security	All-glass laminate
Lowest interior budget	Acrylic
Scratch resistance	Glass-clad or all-glass

Limitations to Weigh

Polycarbonate scratches without a hard coat and is generally interior-use. Glass-clad and all-glass are heavier and costlier, demanding stronger framing. Acrylic is limited to lower levels. And all materials are bullet-resistant only to their rated level, only as part of a complete, matching, anchored system.

Common Mistakes

• Using bare polycarbonate on a high-touch counter without a hard coat.
• Putting polycarbonate outdoors where a glass-clad face would last longer.
• Choosing all-glass in a retrofit without checking structural load.
• Assuming acrylic scales to rifle levels — it doesn’t.
• Specifying material before confirming the required UL level.

Myth vs Fact

Myth	Fact
“Glass is always stronger than plastic.”	Polycarbonate is lighter and superior for multi-hit and forced-entry resistance.
“Polycarbonate is only for cheap jobs.”	It’s the go-to for lightweight, high-performance interior and retrofit work.
“Acrylic and polycarbonate are the same.”	Acrylic is monolithic and lower-level; laminated polycarbonate is layered and higher-performing.
“Any material can go anywhere.”	Interior vs exterior and weight constraints dictate the right family.

Comparison Table

Feature	Laminated PC	Glass-clad PC	All-glass	Acrylic
Weight	Lightest	Heavy	Heaviest	Moderate
Scratch resistance	Low (needs hard coat)	High	High	Moderate
Multi-hit / forced entry	Excellent	Very good	Good	Fair
Interior/exterior	Mainly interior	Exterior-capable	Exterior-capable	Interior
Typical level range	1–3	Up to 8 + AP	Up to 8	Lower
Relative cost	Moderate	Higher	Higher	Lowest

Decision Matrix

Scenario	Recommended type
Bank teller / pharmacy counter (interior)	Laminated polycarbonate, no-spall
School security vestibule	Laminated polycarbonate
Government façade / courthouse exterior	Glass-clad polycarbonate or all-glass
Embassy / military exterior	Glass-clad polycarbonate
Budget interior service window	Acrylic
Corrections containment barrier	Laminated polycarbonate

Cost Considerations

As a general ordering, acrylic is most economical, laminated polycarbonate is moderate (with installation savings from its light weight), and glass-clad and all-glass assemblies are higher. But the required UL level, size, framing, and hardware move the total significantly, so request a specification-based quote. Factor lifecycle cost: a hard coat on polycarbonate or a glass face outdoors extends service life and reduces replacement.

Regulations & Standards

All four families are rated to UL 752 (Levels 1–10) for US architectural work; occupied spaces should use no-spall or low-spall glazing. EN 1063 (BR1–BR7, SG1–SG2) is the European equivalent. Certain composite panel products carry an ASTM E119 fire rating. Glazing must sit in a rated frame per GANA glazing guidelines.

Best Applications

Interior counters and vestibules → laminated polycarbonate or acrylic. Exterior, weather-exposed, high-security openings → glass-clad polycarbonate or all-glass laminate. See the applications by industry article for specifics.

Related Products

Whatever the glazing family, it pairs with rated frames (aluminum, hollow metal, stainless steel), doors, ballistic fiberglass wall panels for opaque areas, and transaction hardware. Armortex supplies all as a single source.

Evaluation Checklist

1. Is the required UL 752 level established?
2. Interior or exterior opening?
3. Is weight/structure a constraint (retrofit)?
4. Is scratch resistance critical (high-touch)?
5. Is a hard coat specified for polycarbonate?
6. Is no-spall / low-spall required?
7. Does the material family reach the needed level?
8. Is the frame rated to the same level?
9. Is optical clarity a priority?
10. Has cost been evaluated on a lifecycle basis?

Professional Evaluation

Specifiers select the lightest family that meets the level for the opening, confirm hard-coat and spall requirements, verify the frame rating, and check UL Listing and (for federal work) GSA / U.S. Marshals approval.

Example Specification Language

“Provide UL 752 Level [__] bullet-resistant glazing, [laminated polycarbonate with abrasion-resistant hard coat / glass-clad polycarbonate / all-glass laminate], UL Listed as no-spall, set in a matching rated frame anchored per GANA guidelines.”

FAQs

Is polycarbonate or laminated glass better for bulletproofing? Polycarbonate is lighter and better for multi-hit and forced-entry resistance and interior use; laminated/all-glass is heavier but more scratch-resistant and durable outdoors. The best choice depends on the opening.

What is glass-clad polycarbonate? A composite bonding a hard glass face to a polycarbonate core, combining the scratch resistance and clarity of glass with the stopping power of polycarbonate — ideal for exterior, high-security use.

Does polycarbonate scratch easily? Bare polycarbonate does, so an abrasion-resistant hard coat is commonly specified, especially in high-touch interior applications.

Is acrylic bulletproof? Bullet-resistant acrylic exists for lower UL 752 levels and is a budget interior option; it does not reach the higher rifle levels.

Which type is lightest? Laminated polycarbonate — which is why it’s favored for retrofits and interior barriers where weight matters.

Can any type be used outdoors? Glass-clad polycarbonate and all-glass laminate are best for exterior use; bare polycarbonate is generally interior.

People Also Ask

What is bulletproof glass actually made of? Layers of polycarbonate, acrylic, glass, or a glass/polycarbonate composite bonded together to absorb and capture projectiles.

Why is polycarbonate used in bulletproof glass? Because it’s light and flexes to absorb energy, giving excellent multi-hit and forced-entry performance.

How thick is bulletproof polycarbonate? It varies by level; for example, Armortex TP 200 is roughly 1.00 inch and about 6.4 lb/sq ft — confirm exact figures per product.

Glossary

• Acrylic (ballistic): monolithic cast plastic glazing for lower levels.
• Glass-clad polycarbonate: glass face bonded to a polycarbonate core.
• Hard coat: abrasion-resistant surface treatment for polycarbonate.
• Laminated glass: bonded glass plies.
• Laminated polycarbonate: layered polycarbonate; lightest ballistic glazing.
• Monolithic: a single continuous layer of material.
• No-spall / low-spall: designations for fragmentation behavior on the protected side.

References

• Armortex® — Glazing product documentation (TP 100/200/300; glass-clad and all-glass assemblies).
• UL Solutions — UL 752, Standard for Bullet-Resisting Equipment.
• European Committee for Standardization — EN 1063.
• ASTM International — ASTM E119.

Final Recommendation

Match the material family to the opening and the required UL 752 level: laminated polycarbonate for lightweight interior and retrofit work (with a hard coat), glass-clad polycarbonate for durable exterior and high-security openings, all-glass laminate where clarity and durability outweigh weight, and acrylic for budget interior windows at lower levels. Always install in a matching rated frame. Armortex manufactures all four families, tested to UL 752 Levels 1–10 under an ISO 9001 system.

Product dimensions and weights vary by level and make-up; confirm exact figures with Armortex. Armortex® — 5926 Corridor Parkway, Schertz, TX 78154 · 1-800-880-8306 · info@armortex.com.