Static sealing solutions for all industries

Bonded Seals

High pressure sealing solution

The bonded seal (also known as Dowty Seals and Dowty Washers) consists of a metal insert with a vulcanised rubber compound profile that is bonded to the bore. The bonded seal is designed to achieve both pressure and vibration resistance in high pressure and temperature conditions where metal washers are inadequate.

Dowty seals can be used in a wide range of applications in the fluid transfer area. These include: fuel systems, HVAC systems, hydraulic systems and pneumatic systems.

Our Dowty Washers are manufactured in Europe at our factory in Gozo (Malta).


The type of metal and the compound used will vary according to the type of fluid in the application, the operating temperature, etc.

The metal insert is available in different materials such as mild steel, stainless steel, brass, aluminium, etc.

When required, an anti-corrosion surface treatment is also available. The range of compounds includes NBR, HNBR, FKM, EPDM, etc.

The compounds can also be developed according to customer requirements.

An improvement on the original design is the self-centring glued seal which will allow ease of assembly and eliminate the risk of compensation. In addition to a standard range of sizes, Hutchinson can develop and supply customised solutions to customer requirements.