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German glass experts get another tool in the toolbox

Eastman received an aBG from the DIBt for laminated safety glass made with Saflex Structural

German architects are widely admired for designing stunning and complex glass buildings. Eastman went the extra mile to give German designers more design flexibility by obtaining an aBG for laminated safety glass made with Saflex® Structural (DG) PVB interlayer. We can’t wait to see what comes next!

To facilitate glazing choices, Eastman has now received a General Construction Approval (Allgemeine Bauartgenehmigung, aBG Z-70.3-254) from the German Institute for Building Technology (Deutsches Institut für Bautechnik [DIBt]). The new approval will allow Saflex Structural (DG) interlayer to be used in the design and construction of laminated safety glass, taking into account the enhanced mechanical properties of the interlayer.


German standard DIN 18008 does not allow laminated glass strength to be enhanced with interlayer contributions.

Therefore, an aBG is a great option when engineers want to use the structural capacity of the interlayer to optimize their glass design for structures in Germany. Eastman demonstrated, via external expertise, that Saflex Structural (DG) material properties contribute to the glass strength in common load scenarios for internal and external glass applications. With this approval, laminated glass made with Saflex Structural (DG) can be fully utilized in accordance with the German standard through use of shear transfer properties.


Glass is a key design element for architects, and this added endorsement from the DIBt offers more performance choices.

“The recognition by the DIBt that laminated safety glass with Saflex Structural (DG) can be used for the interlayer properties in glass design and construction is a significant step forward,” says Kevin Moens, global commercial director of architectural for advanced materials, interlayers. “Glass is a key design element for architects, and this added endorsement from the DIBt offers more performance choices. The material model in the approval helps engineers design laminated glass while maximizing the interlayer properties in their calculations, whatever the relevant load scenarios may be. By creating the groundwork for the expanded use of this versatile product, we hope this sparks imagination and creativity in the use of structural glass.”


Saflex Structural (DG) interlayer is a tough, resilient film produced from plasticized polyvinyl butyral (PVB) for structural glazing.

It is designed specifically for applications requiring superior structural capacity, higher uniform load capacity, increased interlayer rigidity, and high glass adhesion, making it ideal for larger glass and structural applications such as railings, glass fins, and glass floors. Saflex Structural (DG) interlayer is capable of keeping glass intact at high and low temperatures, even after impact and under load.

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