Supreme® seals

We believe a seal should deliver top performance, keep you going and offer you Peace of Mind. This idea led to the development of the Supreme seal. Introduced in the 1980s and further developed ever since, Supreme seals offer a ‘plus’ to many propulsion systems and vessels worldwide.

The Supreme stern tube seals and Supreme thruster seals are produced with high quality housing parts, lip seals and liners. Our Modular, Made-to-Measure philosophy enables us to deliver customer-specific designs combined with short quotation, lead and delivery times. In addition, the Supreme seals are suitable for both new-build and retrofit applications.

The list of advanced options like an HML coating for extra durable liners and environmentally acceptable lubricant (EAL) compatible lip seals allows you to enhance your seal design to your preferences.

Our Supreme seals are suitable for the following applications:

For an complete overview of all Supreme seals, customised options and additional products, download our Maritime Seals brochure!

Our Supreme range is a reliable stern tube sealing solution. Consisting of bronze housing parts (or cast iron to fit inland vessels), and also available in a split version, the aft seal prevents water ingress and oil leakage to the outside environment. The forward seal consists of cast iron housing parts and contains two oil-repellent lip seals preventing oil leakage to your engine room. Both seals are executed with a stainless steel liner. Complemented with a broad range of options, the Supreme seal can be fully customised to your specific sealing need to guarantee your Peace of Mind.

  • Highly corrosion resistant
  • Modular, Made-to-Measure
  • Effective separation of water and lubricants
  • optimised Total Cost of Ownership
  • Available with a broad range of options
  • Suitable for both new-build and retrofit applications
  • Bonding in situ possible

Download maritime brochure

Green sealing solutions

Lagersmit cares for nature and respects regulations to protect the (maritime) world. We therefore also have green sealing solutions helping you to be compliant with different regulations and protecting nature. The Supreme Ventus and Supreme Athmos are our green sealing solutions, both ensure zero emissions of oil.

The seal matching your application

Supreme seals are suitable for both new build and retrofit applications. Use them on any type of marine propulsion units, where durability matters most.

“The Supreme shaft seal is a high quality shaft seal for demanding purposes. Lagersmit has skillful personnel and the organization is very customer friendly. We get a quick response if we place an inquiry and we get fast and flexible deliveries. They’re always ready and willing to do their best to serve their customers.”


“The Supreme seals is one of the best shaft seals available in the market. We have a good cooperation with Lagersmit. The team is easy to work with and you always get a fast response when parts and technical support are needed.”

Cat Propulsion

More information


Lagersmit Account Management