Wevo-Chemie Launches PFAS-Free Silicone Sealant
The new Wevosil 20000 A/B adhesive offers high thermal resistance for use in AEM electrolysers and flow batteries.
Updated on Oct. 26, 2026 in Chemistry
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Wevo-Chemie has unveiled Wevosil 20000 A/B, a PFAS-free silicone sealant and adhesive designed for demanding applications in AEM electrolysers and flow batteries. The product features a 1:1 mixing ratio and is optimized for use in alkaline environments.
Why it matters
The sealant was developed to withstand high temperatures and significant compression within energy storage and production systems. Its composition provides an alternative that avoids the use of per- and polyfluoroalkyl substances.
The material maintains a hardness of 50 Shore A and a dielectric strength greater than 20kV/mm. It exhibits volume and surface resistivity greater than 10^14 Ω·cm.
The players
Wevo-Chemie
This organization is a chemical manufacturer specializing in polyurethane, epoxy, and silicone systems.
Laufenberg
This company is a partner collaborating with Wevo-Chemie to manufacture prefabricated flat gaskets.
The details
Engineered for precise application, the material can be processed via screen printing, dispensing, or roll-to-roll methods, with layer thicknesses ranging from 50 to 500µm. Curing takes place at temperatures between 100°C and 140°C, with a tack-free state achieved in 1 to 2 minutes.
Timeline
Wevo-Chemie unveiled the Wevosil 20000 A/B product on October 26, 2026.
The Big Picture
This release shifts the discipline by addressing the specific chemical resistance needs of AEM electrolysers. It moves the field away from traditional sealants that may contain legacy fluorinated compounds.
This development could tangibly impact the efficiency and durability of future green hydrogen production facilities and battery storage systems. Manufacturers may see improved component lifespan due to the material's specific thermal and chemical resilience.
The takeaway
The move reflects a broader industry shift toward eliminating PFAS in high-performance industrial seals. Engineering teams should evaluate compatibility with existing oven curing processes when integrating these new adhesives.
Further reading
Explore more material science innovations in our Chemistry section.
Source note: This article includes information reported by Engineerlive.
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