Type approved Stern Tube Seals

Our spare parts are compatible with all major brands

The stern tube seal spare parts on your vessel need to be overhauled every five years during dry-dock maintenance. Checking and replacing these seals is crucial to prevent leakage and emergency repairs while the vessel is at sea. Regular maintenance by a trusted partner will help mitigate these risks and ensure safety and environmental protection. Manufactured in Europe to our own high specifications, RM Propulsion’s Ocean Seal® is ideal for meeting your vessel’s maintenance requirements.

Ocean Seal® Type approved

Our Ocean Seal® is Type approved and is made in Europe to our own high specifications. For the stern tube seals we are using FKM (commonly referred to as Viton®) or HNBR (commonly referred to as Perbunan S®).

Stern tube seal spare parts compatibility

Our stern tube seal spare parts are compatible with all common maker systems. The materials we use for our stern seals are suitable for both EAL oils and mineral oil. They fit lip seal systems of all major brands of oil-lubricated systems, including air seals.

*RM Propulsion has no commercial relationship with the mentioned companies or brands on our website. We are an independent company in the marine industry.

What we offer

1
Type approved Stern tube seal
Type approved stern tube seal. Stern tube seal spare parts are in Stock in Europe and China. Air seals & Oil lubricated stern tube seals FKM or HNBR seals Fast delivery from stock. The materials we use are suitable for both EAL oils and mineral oil.
2
Complete installation kit
We supply all the components you need for a complete stern tube seal system overhaul, including liner O-rings, oil line O-rings, gaskets, anodes and fasteners.
3
Chrome steel liners
Our aft and forward chrome steel liners are OD finished and suitable for use with all standard systems. Other machining work is carried out by the customer.
4
Distance rings / spacer ring
Our aft and forward chrome steel liners are OD finished and suitable for use with all standard systems. Other machining work is carried out by the customer.
5
Net cutters
For extra protection of your stern seals use our Net cutters.
6
Stern tube seal spare parts warranty
Our seals come with one-year warranty.

What is a stern tube?

The tube that directs the propeller shaft from inside the vessel to the outside is known as the stern tube. It contains sleeve bearings to carry the propeller shaft, and these bearings can be lubricated with either oil or water depending on the design.

What are stern tube seals for?

The stern tube passes from inside the vessel to the outside below the waterline. This means it must be sealed to prevent water from entering the hull and to prevent oil from leaking out of the stern tube. Seawater damages the stern tube bearings, and oil pollutes the environment.

What’s the difference between FWD & AFT seals?

Specific stern seals are required for different applications on your vessel. The forward stern tube seal is required to prevent oil from leaking from the stern tube into the engine room. Meanwhile, aft stern seals prevent water from entering the stern tube and oil from leaking into the aquatic environment.

Type approved Stern Tube Seals

Ocean Seal® Type approved

Stern tube seal spare parts compatibility

*RM Propulsion has no commercial relationship with the mentioned companies or brands on our website. We are an independent company in the marine industry.

What we offer