Welcome to Kiwi Shaft Seal

The stainless steel Kiwi Shaft Seal™ offers protection for your vessel, keeping crew safe and dry. The Kiwi Shaft Seal™ is a New Zealand made product which is easy to install and has a 15 year pleasure craft or 5 year commercial craft guarantee (Conditions apply).

It has taken 30+ years of marine industry experience to develop and refine this breakthrough alternative to stuffing box and mechanical type marine shaft seals.

The Kiwi Shaft Seal™ is available from 1” to 6” in ¼” increments. (Equivalent metric sizes available on request).


Each unit is now fitted with a Heat Sensor – Kits come complete with a dash mounted warning system that activates if the seal is compromised due to lack of coolant.

Kiwi Shaft Seals (KSS)

  • Easy Installation
  • Maintenance Free
  • Fitted with Heat Sensor
  • HI-TORQUE Stainless Steel Hose Clamps
  • High Performance Radial LUP Seal
  • Marine Grade Stainless Steel Housing
  • Thordon Guide Bush: contains friction and noise reducing additives
  • Adjustable Compact Length
  • Rebuild-able: you only purchase ‘new’ once
  • Customer Identified with Build Number
  • Individually Tested
  • Strong Reinforced Hose

Additional safety feature: Heat Warning System.


  • Variety of marine applications including, Struts, Stern tubes & Rudders
  • SSB standard sizes suit shafts from ¾’ to 4”
  • SSB will not lock onto the rotating shaft
  • Can be machined to custom sizes to suit supplied housing & shaft measurements
  • Rolls out particles without scoring the shaft or liner
  • Less wear and greater misalignment tolerances as a result of a larger water film
  • Does not require ANY grease
  • Easy to replace – can be glue, press or freeze fitted


  • Designed to be fitted with Kiwi Small Ship Thordon bearings
  • Manufactured to a very accurate ID & OD
  • Accommodates all sizes of Kiwi Shaft Seals
  • For shaft sizes 3/4″ to 4″ in diameter & lengths up to 5 metres
  • The number of Kiwi Small Ship bearings and position in stern tube can be easily adjusted to provide correct shaft support.
  • Can be fitted to any type of hull construction
  • Able to be fabricated into Aluminium, steel, timber, GRP(fibre glass)
  • Will not suffer from corrosion