VERSIV™ Composites

Darlyn & Flueflex Environmental Composites

VERSIV™ Protection Linings for Multilayer Expansion Joints & Ducting

Darlyn & Flueflex Environmental Composites

Based on a high-strength woven fiberglass substrate, this material has superb mechanical strength and flexibility. Engineered for use in wet and dry flue-gas conditions in flexible expansion joints, this versatile product can be used as a single-layer expansion joint or as part of a multilayer configuration.
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Product Details 

Used in flue gas desulphurization, gas turbine systems, power plants, and the petrochemical industry, Darlyn & Flueflex Environmental Composites are reliable, low-maintenance, and cost-effective. Benefit from a gas-tight film barrier, chemical and corrosion resistance, and long-term strength retention and resistance. High-temperature resistance is standard, and their crack-free surface protects against corrosive and toxic fluids. Made with fine-filament fiberglass fabric engineered and woven in-house, these composites withstand chemical attack, high temperatures, and vibration – all while compensating for misalignment and movement in ducting. With a multi-laminar construction, they are void and pinhole-free, optimizing the cost/benefit trade-off relating to barrier properties. Compliance includes 2002/95/EC RoHS I, 2011/65/EU RoHS II & 2015/863/EU RoHS III.


  • Flue gas desulphurization 

  • Gas turbine systems

  • Power plants

  • Petrochemical industry

  • Cement plants

  • Chemical Storage

  • Spray shields

  • Splash protective curtains

Typical Properties

Darlyn & Flueflex

Product Name Widths Available Weight Thickness Tensile Strength Trap Tear Strength
1100 CB 1450mm 2370g/m2 1.400mm 2300x2400N/cm 1130x1800N
1000 BF 1540mm 2000g/m2 1.200mm 1900x1700N/cm 800x900N
1000 BF2 1500mm 2220g/m2 1.300mm 1650x1250N/cm 600x800N
350 BF 1450mm 730g/m2 0.410mm 550x500N/cm 100x150N
350 BP 1450mm 780g/m2 0.450mm 550x550N/cm 100x110N
850 BF 1700mm 1370g/m2 1.000mm 770x450N/cm 180x200N

*Nominal values. These values should not be used to design



Saint-Gobain Composite Solutions is a long-trusted partner for creating highly specialized, technology-driven material solutions that deliver extraordinary performance across a spectrum of demanding settings. Through collaboration with our customers, we co-develop versatile materials and real application tests to ensure that you have the best possible solution for your application. We help create innovative materials that provide protection, easy release, insulation, and friction control. And we seek to collaborate in making it even more possible.

Collaborating engineers

Rigorous testing standards

Saint-Gobain Composite Solutions develops custom application testing based on each of our partner’s product uses in order to create the best possible solution. Some tests that are included but are not limited to environmental, durability, and reliability testing to give you peace of mind making sure that products work in the hardest environments. Our testing begins during the co-development process to develop relevant tests and gather data that allows us to create market-ready solutions quickly.

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