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Rubber Bonded Seal

A rubber bonded seal, also known as a bonded washer or sealing washer, is a type of sealing component that combines a metal washer with a rubber or elastomeric sealing element. 

This design provides the benefits of both a rigid metal washer and a flexible rubber seal, offering effective sealing and secure fastening capabilities. Rubber bonded seals are commonly used in a variety of applications to provide a reliable seal against fluid or gas leakage and to prevent the loosening of fasteners. Here are some key features and common applications of rubber bonded seals:

Key Features:

Dual Material Construction: Rubber bonded seals are constructed with a metal washer and an elastomeric rubber sealing element, typically made from materials like NBR (Nitrile Butadiene Rubber) or EPDM (Ethylene Propylene Diene Monomer).

Sealing Effectiveness: The rubber element provides a flexible and compressible seal that conforms to irregular surfaces, ensuring a reliable and effective seal against fluid or gas leakage.

Mechanical Fastening: The metal washer provides a rigid surface for mechanical fastening, allowing the seal to be securely attached to the application.

Temperature and Chemical Resistance: The choice of elastomeric material allows for resistance to a range of temperatures and chemical exposure, depending on the specific material used.

Vibration Damping: Rubber bonded seals can help dampen vibrations and reduce noise in certain applications.


Automotive Industry: Rubber bonded seals are widely used in automotive applications, including engine components, oil pans, transmission systems, and various fluid systems, to prevent leaks and ensure sealing integrity.

Hydraulic Systems: In hydraulic systems, rubber bonded seals are used to seal fittings, connections, and joints, preventing hydraulic fluid leakage.

Pneumatic Systems: In pneumatic systems, they serve a similar function by preventing air or gas leakage at connections and fittings.

Industrial Machinery: Rubber bonded seals are used in various industrial equipment, such as pumps, compressors, and valves, to ensure sealing integrity.

Plumbing and Pipework: They are used in plumbing applications for sealing connections and joints in water and gas systems.

Aerospace and Aviation: In aircraft, rubber bonded seals are used in critical applications where sealing effectiveness is paramount, such as fuel systems.

Marine Applications: Rubber bonded seals are used in ships and boats for sealing connections in hydraulic and fluid systems.

Construction Equipment: In construction machinery, where heavy-duty sealing is required to prevent leaks in hydraulic systems.

Power Generation: In power plants, rubber bonded seals are used in various components, including pumps and valves, to prevent fluid leaks.

Renewable Energy: In wind turbines and solar panels for sealing and preventing fluid leakage.

Medical and Healthcare Equipment: In medical devices and equipment for sealing fluid and gas connections.

Rubber bonded seals provide an effective sealing solution in various industries and applications. The choice of specific rubber material and metal washer material depends on the application's requirements, including the type of fluids, temperatures, and pressures involved. Proper installation and maintenance are crucial to ensure the continued effectiveness of rubber bonded seals.

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