Wevo-Chemie Launches PFAS-Free Silicone Sealant
The new material offers high thermal and chemical stability for electrolysers and flow batteries.
Updated on Oct. 26, 2026 in Chemistry
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Wevo-Chemie has launched Wevosil 20000 A/B, a PFAS-free silicone sealant and adhesive designed for use in AEM electrolysers and redox flow batteries. This product is now available globally for high-performance energy storage and production applications.
Why it matters
The material is specifically engineered to maintain structural integrity under the high-alkaline and elevated-temperature conditions inherent in next-generation electrochemical systems. By providing a chemically stable, fluorine-free option, it supports the move toward more sustainable material lifecycles in the green energy sector.
The silicone sealant features a 50 Shore A hardness and maintains a dielectric strength greater than 20kV/mm. It offers volume and surface resistivity exceeding 10^14 Ω·cm, ensuring insulation performance across varying operational conditions.
The players
Wevo-Chemie
A specialist in high-performance polyurethane, epoxy, and silicone-based resins for the electrical and electronics industries.
Laufenberg
A manufacturing partner collaborating on the production of prefabricated flat gaskets utilizing new silicone formulations.
The details
Wevosil 20000 A/B utilizes a 1:1 mixing ratio optimized for standard twin-cartridge dispensing systems. The material is versatile in application, supporting screen printing or continuous roll-to-roll processes with layer thicknesses between 50 and 500µm. Curing is thermally triggered, requiring convection ovens or infrared heaters set between 100°C and 140°C to achieve a tack-free state.
Timeline
October 26, 2026: Wevo-Chemie officially unveiled the Wevosil 20000 A/B silicone sealant.
The Tech Race
This development aligns with the broader push to eliminate per- and polyfluoroalkyl substances (PFAS) from industrial energy infrastructure. It positions Wevo-Chemie to compete in the growing market for specialized sealing materials required by the expanding electrolyser and flow battery sectors.
Manufacturers of electrolysers and redox flow batteries can immediately integrate this material into production lines via existing dispensing or roll-to-roll infrastructure. The availability of this PFAS-free sealant allows engineers to swap out legacy materials while meeting increasingly stringent environmental regulations.
The takeaway
This material provides a drop-in replacement for designers seeking to remove fluorine-based compounds from their energy storage assemblies. Watch for performance validation data from pilot-scale hydrogen electrolyser installations over the coming year to confirm these lab-tested metrics.
Further reading
Explore more developments in materials science and sustainable manufacturing within our Chemistry section.
Source note: This article includes information reported by Engineerlive.
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