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.