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A high‑performance fluoroelastomer material specifically formulated for compatibility with Environmentally Acceptable Lubricants in marine applications.

  • EAL compatible
  • Marine propulsion

Bi-O-Lion has been developed as part of an extensive compatibility testing programme designed to provide a clear understanding of the effect on seals and components of switching to Environmentally Acceptable Lubricant (EAL) products.

Through this programme we explored the suitability of a vast range of elastomer formulations against more than 30 major EAL products currently in use.

Bi-O-Lion is a high-performance fluoroelastomer material which has been specifically formulated for compatibility with Environmentally Acceptable Lubricants (EALs) and EAL / seawater media:

  • Resistant to degradation and swelling in use with EALs
  • Suitable for all marine propulsion duties including stern tubes, steering gear, stabilisers, thrusters and POD propulsion systems
  • Fully evaluated in both static immersion and dynamic testing for a minimum of 1,000 hours
  • Designed to match maintenance schedules for vessels running EALs
  • This material is also suitable for O-ring and hydraulic sealing components

Bi-O-Lion has been tested with over 30 of the most common EALs currently in use. As the number of EALs on the market continues to grow, our test programme will also continue. Future results will be published on this website but if a specific lubricant is not currently featured in our results, and you would like it testing, please ask your EAL supplier to contact us.

Bi‑O‑Lion fluoroelastomer has been Type Approved, by Bureau Veritas, for use in a marine propulsion sealing gland application. Download the Bureau Veritas certification here.

Related Downloads

Bi-O-Lion product guide

English pdf (3 MB) Download

Bi-O-Lion technical report

English pdf (1 MB) Download

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