For more than six decades, Isoclima Specialty Glass and its U.S. companies have been shaping the future of security glazing and architectural glass solutions. With deep roots in Pennsylvania and Alabama, the company’s history is woven into some of America’s most demanding projects, from correctional facilities and embassies to schools, hospitals, and armored vehicles.

From Craftsmanship to Cutting-Edge Security

The American story begins in 1947, when Charles F. Dlubak founded Dlubak Studios in Blairsville, Pennsylvania. Originally a stained-glass workshop, the company evolved under the vision of his son, Frank Dlubak, who introduced bent and curved glass to the market in the 1970s. These innovations propelled the company into landmark projects such as the Statue of Liberty restoration, Times Square revitalization, and the American Express flagship building.

By the 1980s, Dlubak had phased out stained glass and transitioned fully into integrated glass solutions, becoming a recognized leader in bent, laminated, and specialty glass. His impact was so significant that in 1998, Frank Dlubak was inducted into the Glass and Metal Hall of Fame.

Expanding Security Glass Manufacturing in Alabama

Meanwhile, in Selma, Alabama, Global Security Glazing (GSG) was pioneering bullet-resistant, blast-resistant, and forced-entry resistant glass solutions. For more than 60 years, GSG has supplied laminated glass, glass-clad polycarbonates, and architectural glazing for correctional facilities, courthouses, embassies, and hospitals.

The company also built a reputation for testing and certification, ensuring every product—from bullet resistant glazing to hurricane glass—meets strict industry standards. Its Single Responsibility Program guarantees that every piece is manufactured with meticulous attention to detail, giving architects and contractors confidence in performance.

Isoclima Group Joins Forces with U.S. Leaders

Founded in 1977 in Este, Italy, Isoclima Group had already established itself as a pioneer in curved, bullet-resistant, and transparent armor glass by the 1980s. In 2021, Isoclima expanded into the U.S. market by acquiring both Global Security Glazing in Selma, AL, and Dlubak Specialty Glass in Blairsville, PA.

This move brought together decades of American craftsmanship and European innovation under one banner. Today, Isoclima Specialty Glass serves as a single source for security glass, architectural glass, and transportation glazing, delivering solutions for projects across education, government, healthcare, and defense.

Innovation That Meets Tomorrow’s Challenges

From laminated security glass for schools to ballistic and blast-resistant glazing for government buildings, Isoclima Specialty Glass continues to invest in U.S. manufacturing and research. By uniting the expertise of GSG and Dlubak with Isoclima’s global leadership, the company has secured its place as a trusted partner for architects, contractors, and facility owners seeking tested, certified, and proven security glazing solutions.

The legacy is clear: a history of innovation, a commitment to safety, and a vision for the future of glass in America.

Visit Isoclima Specialty Glass at GlassBuild America 2025 in Orlando. Explore CHILDGARD®, ballistic, fire-rated, bird-friendly, and curved glass solutions.

This November, Isoclima Specialty Glass is proud to exhibit at GlassBuild America 2025 in Orlando—the premier glass, window, and door event in North America. As an industry leader in protective and specialty glazing, we are excited to showcase our full range of products designed to meet today’s most demanding safety and performance standards.

At the forefront of our display will be CHILDGARD® security glazing, the trusted solution for schools and educational facilities. CHILDGARD is specifically engineered to withstand forced-entry attempts, providing peace of mind for architects, school districts, and security professionals seeking the highest level of protection.

In addition to CHILDGARD, our team will be on hand to educate attendees and provide resources on our full product portfolio, including:

Ballistic Glass – designed for defense, government, and commercial applications requiring advanced protection.

ACCESSGARD Forced Entry Resistant Glass – engineered to delay intrusion and provide critical response time.

InfernoGard Fire-Rated Glass – meeting rigorous code standards for fire safety while maintaining visibility and design flexibility.

Bird-Friendly Glass – helping reduce bird collisions while supporting sustainable building practices.

Bent and Curved Glass – bringing creative design visions to life with custom shapes and precision engineering.

GlassBuild America is the perfect opportunity to connect with our team, learn more about our solutions, and explore how Isoclima Specialty Glass continues to set the standard in safety glazing and specialty glass innovation.

Join us in Orlando, November 4th-6th in booth #19042 at GlassBuild America 2025 and see why Isoclima Specialty Glass is a trusted partner for protective and architectural glass solutions.

Isoclima Specialty Glass is proud to participate in the upcoming Pauly Jail Mental Health & Criminal Justice event, taking place October 21–22 at the Four Winds Casino in New Buffalo, Michigan. Pauly Jail has built a strong community over the years through these gatherings, bringing together industry leaders to share knowledge, explore innovations, and strengthen connections across the correctional design and construction space.

This year’s program includes a unique tour of the new Westville, Indiana State Prison, alongside informative sessions on design advancements, new technologies, prefabrication, and much more. As a trusted partner in correctional facility glass and glazing solutions, Isoclima is excited to engage with attendees and highlight the protective and performance-driven products that support safer, more secure environments.

We look forward to joining the conversation, learning from peers, and contributing to the continued progress in this important field.

Isoclima Specialty Glass, a global leader in high-performance security glass and glazing solutions, is proud to announce our participation at the upcoming GSX (Global Security Exchange) 2025, taking place September 29 – October 1 in New Orleans, Louisiana. You can find us at booth #563, where we will showcase our innovative range of products designed to protect people and property in the most demanding environments.

Showcasing Security Glass Solutions at GSX

At GSX 2025, Isoclima will highlight our industry-leading portfolio of ballistic glass, forced-entry resistant glazing, fire-rated glass, and specialty architectural products. These solutions are engineered to meet today’s evolving security challenges across a wide range of applications including government buildings, correctional facilities, commercial properties, schools, healthcare facilities, and critical infrastructure.

As one of the most important security industry events in the world, GSX brings together security practitioners, consultants, architects, and technology experts from every sector. Isoclima is proud to stand at the forefront of this global community with glazing products that combine safety, performance, and design flexibility.

Why Visit Isoclima at GSX?

· Learn how our ballistic and forced-entry glass meets UL 752 and ASTM standards for high-security applications.

· Discover our CHILDGARD® glass, the leading solution for protecting schools and educational facilities.

· Speak directly with our team of experts about project-specific solutions.

About GSX

The Global Security Exchange, organized by ASIS International, is the premier security industry event with thousands of professionals gathering to explore the latest innovations in physical security, cyber security, and risk management.

Join Us in New Orleans

We invite all attendees to stop by booth #563 to see firsthand how Isoclima’s protective glass and glazing systems are shaping safer spaces worldwide. Whether you’re an architect, security consultant, general contractor, or facility manager, our team is ready to help you find the right solutions for your next project.

When searching for security glass, you’ve likely come across the terms “bullet proof glass” and “bullet resistant glass.” While these two phrases are often used interchangeably, the truth is that “bullet proof” glass does not exist.

At Isoclima Specialty Glass, we believe education is as important as innovation, which is why we’re here to break down this important distinction and show why bullet resistant glass is the true standard for safety and performance.

Why “Bullet Proof” Is a Misleading Term

The phrase “bullet proof” implies that a material can withstand any type of ballistic impact under all conditions. In reality, no material is indestructible. Every type of protective glass has its limitations based on thickness, composition, and ballistic rating.

Calling glass “bullet proof” gives a false sense of security. If someone expects absolute protection in every situation, they may overlook the critical details of performance testing, ratings, and installation requirements.

The Accurate Term: Bullet Resistant

The correct industry term is bullet resistant glass. Why? Because it acknowledges that the glass is specifically engineered and tested to resist ballistic threats within defined standards.

Bullet resistant glass is typically tested according to recognized industry standards, such as:

UL 752 (Underwriters Laboratories) ballistic ratings

NIJ (National Institute of Justice) levels

Other government and military-grade standards

These ratings identify what caliber of firearm, number of rounds, and velocity the glass can withstand. The result: real, measurable protection against the most common ballistic threats.

How Bullet Resistant Glass Works

Unlike traditional glass, bullet resistant systems are made of laminated layers of glass and polycarbonate bonded together. This layered design:

Absorbs and disperses energy from the impact

Prevents penetration from specific threats

Maintains structural integrity to protect the people and assets behind it

While the glass may crack or show damage, its strength lies in its ability to stop the bullet from breaching the barrier.

Why the Distinction Matters

For architects, contractors, and building owners, understanding the difference between “bullet proof” and “bullet resistant” isn’t just about terminology — it’s about safety, liability, and trust.

Choosing the right product requires:

Knowing the level of threat your project faces

Matching it with the correct ballistic rating

Leaders in Bullet Resistant Glass Solutions

At Isoclima Specialty Glass, we specialize in designing, engineering, and delivering high-performance bullet resistant glass systems for schools, government buildings, financial institutions, retail, and beyond.

Our team doesn’t just provide products — we provide knowledge, guidance, and confidence that your security glass is matched to the threats you face. That’s why clients nationwide trust us as a leader in ballistic glazing.

Final Word

There’s no such thing as “bullet proof” glass — but there is bullet resistant glass that we have manufactured for years.

If you’re planning a project that requires ballistic protection, let us help you find the right solution.

Across the country, schools and public buildings are under pressure to strengthen their defenses. One solution that has gained attention in recent years is window film—a thin polyester layer applied to existing glass and marketed as a way to keep intruders out.

On the surface, it seems appealing. Films are relatively inexpensive compared to new security glazing, and in live demonstrations they can look surprisingly tough. A rock might bounce off, or a bat might fail to break through right away. But when those demonstrations give the impression of true ballistic or forced-entry protection, they’re painting an incomplete picture.

Window Films: The Reality Behind the Pitch

Independent investigations have shown that window films don’t perform when faced with real threats. Lawmakers in Utah, for example, witnessed film-coated glass shatter under gunfire in a live test. The largest film manufacturers openly state that their products are not bullet resistant and do not meet ballistic standards.

Still, school districts across the country have invested heavily in films—over $100 million in recent years. Some sales demonstrations rely on outdated or thicker glass than most schools actually use, creating results that don’t reflect real-world conditions. Industry experts have warned that this leaves administrators vulnerable to exaggerated claims and misplaced confidence.

The bottom line: window films are not designed to stop bullets. At best, they may slightly slow down an intruder, but they cannot provide the kind of verified protection parents and educators expect.

How CHILDGARD® Security Glass Stands Apart

CHILDGARD® laminated security glass was developed with one purpose: protecting schools and other vulnerable facilities from forced entry. Unlike films, which are applied after the fact, CHILDGARD® is engineered from the start as a protective glazing system.

  • Built with multiple interlayers bonded under heat and pressure.
  • Designed to withstand repeated physical attacks.
  • Independently tested to recognized forced-entry standards.
  • Backed by certifications and documented performance data.

This is not a quick fix. CHILDGARD® is a long-term security solution created to give teachers, students, and staff the precious time they need until help arrives.

Why Choosing the Right Solution Matters

When lives are on the line, the distinction between window film and true protective glass makes all the difference. Films may look attractive because of their lower price, but they were never created to meet the demands of an armed attack. CHILDGARD® provides proven protection that has been tested and certified to perform when it matters most.

In an era when schools face increasing pressure to safeguard their communities, real security requires more than appearances. It requires solutions that are engineered, tested, and trusted.

Looking Ahead

Window films might seem like an easy answer, but the evidence shows they fall short in real scenarios. CHILDGARD® laminated glass offers peace of mind because it’s built for one thing: keeping people safe when every second counts.

See the Wall Street Journal’s perspective on this topic.

Schools Squander Millions to ‘Bulletproof’ Windows. It Doesn’t Work.

Wall Street Journal

Learn more about CHILDGARD®

Contact Us





    Loading...

    In response to increased carjackings, affluent New Yorkers are retrofitting luxury vehicles like Range Rovers and Lamborghinis with bulletproof features to ensure safer travel to destinations like the Hamptons.

    In response to increased carjackings, affluent New Yorkers are retrofitting luxury vehicles like Range Rovers and Lamborghinis with bulletproof features to ensure safer travel to destinations like the Hampton.

    Link: New York Post

    An interview with Meron, Corporate Sustainability Program Manager, Isoclima Group

    In today’s complex global landscape, sustainability is no longer a buzzword—it’s a mandate. Environmental urgency, social inequality, and shifting economic models demand a new kind of leadership—one that aligns business success with broader impact. At Isoclima, this transformation is embodied by Meron, Corporate Sustainability Program Manager, who is leading the Group’s ESG evolution with pragmatism, passion, and purpose.

    Meron brings a rare blend of technical expertise, strategic acumen, and human sensibility to a role that sits at the intersection of vision and execution. “Sustainability isn’t a parallel activity—it’s a business imperative,” she states. “It means ensuring people’s well-being, safeguarding the planet, and strengthening performance. These aren’t separate goals—they’re interconnected drivers of long-term value.”

    Within a year, Meron has contributed significantly to strengthening Isoclima’s ESG strategy and advancing the integration of ESG principles across its global operations. She played a key role in managing projects related to CSRD preparedness and led initiatives to improve the company’s performance on external ESG rating platforms, resulting in enhanced scores. Importantly, she has worked to embed sustainability not only into strategic planning but also into the company’s culture and day-to-day decision-making.

    “My role is inherently cross-functional. I work with HR on wellbeing initiatives, with HSE and Quality on environmental KPIs, with Legal for compliance, and with Procurement to build a more responsible supply chain,” she explains. “But more than anything, it’s about creating shared ownership. Sustainability only works when everyone is involved.”

    Her mission goes beyond compliance—it’s about transformation. From decarbonization and circularity to stakeholder engagement and internal awareness, Meron is positioning Isoclima to lead not only through product excellence but through values. “We’re shifting from reactive to proactive. We’re not just following regulations—we’re aiming to set the pace, turning challenges into opportunities.”

    Meron’s background reflects a clear alignment of purpose and expertise. A Civil Engineer by training, she later pursued an MBA in green energy and sustainable businesses, equipping herself with the tools to shape impactful change. “I wanted my work to make sense—to drive value both for the company and for society,” she reflects. “Sustainability offered the perfect convergence between my technical background and my future-focused vision.”

    As Isoclima accelerates its ESG journey, several key priorities have emerged:

                •           Strengthening ESG governance across all sites

                •           Defining group-wide KPIs and targets

                •           Promoting local partnerships for social impact

                •           Fostering a sustainability-driven internal culture

    One of Meron’s current initiatives is the development of a global network of ESG ambassadors—cross-functional representatives who act as catalysts for sustainability in every business unit. “Sustainability is not a solo act—it’s a mindset. And to scale it, we need a distributed model of leadership.”

    She also sees technology as a vital enabler. “AI and advanced analytics allow us to optimize environmental performance at scale. But innovation must be inclusive and guided by ethics—otherwise we risk creating new inequalities.”

    On occasions like Earth Day, Meron leads awareness campaigns that connect purpose with participation. “We don’t just mark a date—we use it as a platform to deepen understanding and build collective momentum.”

    Looking ahead, her vision is bold yet grounded: to position Isoclima not only as a product leader, but as a sustainability innovator. “We want to be known not only for what we make—but how we make it. This means rethinking processes, empowering people, and redefining impact through a regenerative lens.”

    With a voice that bridges engineering, business mindset and empathy, Meron is helping shape a new era for Isoclima—one where performance, responsibility, and ambition grow together. “The real challenge is not just doing better—but doing differently. And that’s where the future lies.”

    For over 30 years, Isoclima has been working with Mercedes-Benz to provide high-quality armored glass designed to meet the most stringent market demands. Thanks to OmniArmor® technology, Isoclima has been offering advanced solutions for models in the Mercedes-Benz Guard family (G-Class Guard, S-Class Guard, Maybach Guard, and Pullman Guard). An excellent example of armored glass, equipped with a special integrated protection, it is designed to resist bullets, shrapnel, and extreme attacks, ensuring the highest level of safety and reliability in compliance with the highest standards of current regulations.

    Safety First with Mercedes-Benz Guard

    With a history spanning over thirty years, Mercedes-Benz is synonymous with high-quality armored vehicles. When it comes to armored glass, the Guard series from the Star brand, designed for heads of state, public figures, and entrepreneurs who require the highest level of security, represents excellence in the sector. The seventh generation of the S-Class, certified for maximum ballistic protection, offers a unique driving experience. The armored glass, despite being thinner than equivalent solutions available on the market, is designed to protect occupants from high-caliber bullets and explosions, guaranteeing safety and peace of mind in any situation, even in the most extreme.

    Innovation and Security Certifications

    In addition to the armor, the S-Class Guard offers glass with a multi-layered structure reinforced with polycarbonate shrapnel protection. The windows are not electric but pneumatic, ensuring perfect functionality and resistance. The Erv (Explosive Resistant Vehicles) certification guarantees compliance with the highest safety standards, while the use of Primus dummies allows for precise simulation of the effects of impacts and explosions on occupants. These dummies, developed through research and collaboration between the Berlin Polytechnic and the HTW University of Applied Sciences in Dresden, are extremely reliable in simulating the consequences of similar accidents. Isoclima is proud to have passed all required tests and certifications, with its product being an integral part of these highly innovative vehicles.

    With Isoclima alongside Mercedes-Benz, safety becomes synonymous with innovation and quality, offering cutting-edge armored glass solutions for the most exclusive and prestigious vehicles.