At BSCL, we stock an extensive range of bonded washers to fit a wide variety of appliances and specialised machinery. Bonded washers are used in many different applications, ranging from drilling equipment to navigational aids.

What are bonded washers?

Bonded washers combine a rubber seal, pressure bonded to the inside of a metallic washer. The most commonly used material is zinc plated steel, although we can source other varieties. Bonded washers are extremely watertight and thus are frequently used to create leak-proof seals in hydraulic systems.

  1. Advantages of BSCL bonded washers
  2. We provide bonded washers suitable for all different applications, and for contact with different liquids, including corrosive fluids.
  3. Components suitable for use with diesel and low octane fuels
  4. Continuous operating efficiency across an extensive temperature range (approximately minus 29°C to plus 120°C).
  5. Extremely durable and proven to reduce bolting torque, thus reducing wear and tear and the associated maintenance costs.
  6. The best means of face sealing at both high and low pressures
  7. No groove cutting or special machinery required
  8. Components can be reused when remaking joints


BSCL also carry an extensive range of bonded seals or dowty washers.

  1. TYPES & STANDARDS – Self-Centralising Bonded Seals, Standard Bonded Seals. British Imperial, German metric (ISO R261 BS3643), French metric range (ISO R261 BS3643), CETOP Range (ISO 1179:1973).
  2. MATERIALS – Rubber membrane – Nitrile (NBR), Fluorocarbon (FPM), EPDM & Hydrogenated Nitrile (HNBR)
  3. SHORE HARDNESS – NBR90, FPM80, HNBR80
  4. MATERIALS – Metal Washer – Mild Steel (Zinc plated, Clear or Gold passivate) Stainless Steel & Aluminum
  5. BRAND NAMES – Trelleborg(DOWTY), Busak, Parmargan
  6. KITS – For more information on these and our extensive range of other kits, please visit our Kits Section

Find out more

We can accommodate orders ranging from a few units to bulk orders of many thousands of washers. For a competitive, no obligation quote on bonded washers or to discuss what product you need to suit your appliance, please call our sales team today. Alternatively, send us a message through our online enquiries form and one of our advisers will get back to you as soon as possible.