FKM Fluororubber H-Cell Gaskets
FKM Elastomeric Gaskets for Acidic, Hydrocarbon, and Gas-Tight Electrolyte Environments
For a superior re-sealing on H-cell flange under a broad range of demanding environments.
Specifications | Gallery | Pricing | Related Products
FKM, fluoroelastomer gaskets provide a resilient, elastomeric seal for H-type electrochemical cells operating in acidic, hydrocarbon-exposed, or gas-tight electrolyte environments. Unlike rigid PTFE-based seals, FKM's elastomeric structure provides a stronger compression recovery, maintaining sealing pressure and re-sealing reliably across repeated clamping cycles, making it well suited to applications needing a tight, flexible seal that standard silicone cannot provide.
FKM offers superior resistance to a broad range of chemicals compared to silicone, including strong acids, alkalis, and solvents, since concentrated mineral acids such as sulfuric, hydrochloric, or nitric acid attack silicone's chemical structure over time, while FKM's fluorinated backbone remains stable under the same exposure. This makes FKM the stronger choice for H-cells running electrolytes containing high concentrations of these acids.
FKM also holds up well against hydrocarbons and organic solvents, fuels, aromatic oils, and chlorinated solvents, environments where silicone lacks the same chemical resistance and is more prone to swelling and losing its shape under prolonged exposure. This broadens FKM's suitability beyond aqueous electrolytes into mixed or organic-solvent electrochemical systems.
A further advantage is gas-tight retention. Silicone has notably high CO₂ permeability, making it poorly suited to gas-tight sealing, whereas fluorinated elastomers like FKM sit at the low-permeability end of the scale. This matters directly for experiments tracking gas-evolution products, such as CO₂ reduction or water electrolysis, where reduced atmospheric crossover improves the accuracy of gas quantification.
Important limitation: FKM does not perform well with ketones (acetone, MEK), esters, aliphatic and aromatic amines, or low-molecular-weight organic acids such as concentrated acetic or formic acid, all of which cause rapid swelling and mechanical breakdown of the material. Concentrated strong bases above roughly 10% (NaOH, KOH) are also outside FKM's working range, consistent with published degradation studies in alkaline media.
For strongly alkaline electrolytes or systems involving these substances, an ePTFE gasket is the more chemically robust choice.
Acid Stability
Excellent resistance to strong acids as high con. nitric and sulfuric acid
Low gas permeability
Supports accurate gas-evolution tracking
Reusability
Strong elastomeric compression recovery supporting repeated use
Standard Size
Fits standard modular electrochemical dual-chamber setups
Specifications
| Product Name | FKM Fluororubber H-Cell Gaskets |
|---|---|
| SKU | C2055F1 |
| Material | FKM Fluororubber |
| Window Diameter | 15 mm |
| Outer Diameter | 30 mm |
| Thickness | 1.0 mm |
| Colour | Black |
| Number of Gaskets in a set | 10 |
FKM Fluororubber H-Cell Gasket Gallery
Pricing and Options
| Product Name | Product Code | Price |
|---|---|---|
| FKM Fluororubber H-Cell Gaskets | C2055F1 | £25 |
