The Rubber Washer is a vital component across a wide range of professional industries, known for their sealing capabilities and stability, rubber washers play a crucial role in preventing leaks, absorbing vibrations and ensuring the longevity of equipment. This blog serves as your practical guide into the intricacies of the rubber washer, covering their types, materials, applications and where to source high-quality rubber washers in the UK. 

Different Types of The Rubber Washer 

The Rubber Washer is a crucial component in a variety of applications, coming in diverse types, each tailored to specific purposes. Understanding the characteristics and applications of these types is essential for selecting the most suitable option. In this section, we’ll delve into three common types: the Flat Rubber Washer, O-Rings, and the Bonded Rubber Washer.

Flat Rubber Washer

The Flat Rubber Washer is a thin, disk-shaped component with a central hole. They provide a straightforward yet effective solution for preventing leakage and creating a barrier against contaminants. Used widely in plumbing, automotive, and household applications, flat rubber washers are valued for their versatility and easy installation.

These washers find applications in various scenarios, including faucet connections, hydraulic systems, and electrical connections. Their benefits lie in their ease of installation, ability to provide a tight seal, and resistance to corrosion.

Flat Rubber Washer
Different Types of Flat Rubber Washers


O-Rings, with their distinctive shape, offer dynamic sealing solutions for both static and dynamic applications. Their circular design ensures 360-degree coverage, making them ideal for preventing leaks in rotating or reciprocating machinery. O-Rings are available in various materials, with rubber being a popular choice due to its flexibility and durability.

Common applications for O-Rings include hydraulic systems, pneumatic systems, and automotive engines. Their benefits extend to effectiveness in high-pressure environments, resilience, and versatility in material options.

Rubber O-Rings
Imperial & Metric O-Ring Kits

Bonded Rubber Washer 

The Bonded Rubber Washer integrates the flexibility of rubber with the stability of a metal core. The rubber is securely bonded to a metal washer, providing additional strength and structural integrity. This design enhances the washer’s stability and ensures a reliable seal, making them suitable for applications where both flexibility and rigidity are essential.

These washers find applications in industrial machinery, structural components, and heavy-duty equipment. Their benefits include improved load-bearing capacity, resistance to deformation, and enhanced durability.

Rubber Washer Materials  

The Rubber Washer is indispensable in various applications, and the choice of material significantly influences their performance. In this section, we’ll explore the characteristics and applications of different rubber washer materials, including the Neoprene Rubber Washer, EPDM Rubber Washer, Silicone Rubber Washer, Viton Rubber Washer, Nitrile Rubber Washer, and Cork Rubber Washer.

Neoprene Rubber Washer 

The Neoprene Rubber Washer is known for its exceptional resilience and versatility. It exhibits excellent resistance to weathering, ozone, and heat, making it ideal for outdoor applications. Neoprene rubber washers are commonly used in automotive, HVAC, and marine applications.

EPDM Rubber Washer

The EPDM (Ethylene Propylene Diene Monomer) Rubber Washer boasts outstanding weather resistance and durability. It is highly effective in outdoor applications where exposure to sunlight and harsh weather conditions is a concern. EPDM rubber washers are often utilised in roofing, automotive, and outdoor plumbing projects.

Silicone Rubber Washer

The Silicone Rubber Washer offers excellent resistance to extreme temperatures, making it suitable for applications involving heat or cold. It is commonly used in food and beverage industries, medical equipment, and high-temperature environments due to its flexibility and reliability.

Viton Rubber Washer 

The Viton Rubber Washer excels in applications where chemical and heat resistance are paramount. It is widely used in the automotive industry, chemical processing, and aerospace applications due to its ability to withstand aggressive chemicals and high temperatures.

Nitrile Rubber Washer

The Nitrile Rubber Washer, known for its excellent oil and fuel resistance, is a popular choice in automotive and industrial settings. It provides a reliable seal in applications involving petroleum-based products. Nitrile rubber washers are commonly used in engines, fuel systems, and hydraulic equipment.

Cork Rubber Washer

The Cork Rubber Washer combines the natural properties of cork with the resilience of rubber. It is an excellent insulator and is often used in electrical applications. Cork rubber washers find their place in gaskets, seals, and applications where a combination of flexibility and insulation is required.

Rubber Washer Applications

There are many different applications for the Rubber Washer, across a range of professional industries. From the automotive sector to aerospace, industrial machinery to electronics, these small essential components play a critical role in ensuring the efficiency and longevity of equipment and process. Now, let’s delve into each industry in more detail, looking into specific applications of rubber washers within each sector. 

Automotive Industry 

In the automotive industry, the rubber washer finds extensive use for sealing applications and enhancing stability. Neoprene rubber washers, known for their resilience, are commonly employed in engine components, providing a reliable seal against fluids and preventing leaks. Nitrile rubber washers, with their excellent resistance to oil and fuel, contribute to the efficiency of fuel systems and hydraulic applications. Additionally, Viton rubber washers play a vital role in sealing components exposed to high temperatures and aggressive automotive fluids.

Plumbing & HVAC Systems 

Rubber washers are indispensable in plumbing and HVAC systems, where sealing and insulation are paramount. An EPDM rubber asher offers exceptional weather resistance, and is ideal for outdoor plumbing applications, ensuring reliable seals in faucets and hose connections. Silicone rubber washers, known for their flexibility and high-temperature performance, contribute to leak prevention in plumbing connections. Cork rubber washers, with natural insulating properties, find applications in HVAC systems, contributing to the prevention of heat loss and efficient energy use.

Aerospace Industry 

The aerospace industry relies on the rubber washer to ensure the reliability of critical components in demanding environments. Viton rubber washers, with their resistance to chemicals and high temperatures, are integral in aerospace applications where exposure to aviation fuels and hydraulic fluids is common. Neoprene rubber washers contribute to sealing components in aerospace machinery, providing a barrier against the harsh conditions of atmospheric flight.


In the electronics industry, rubber washers play a crucial role in insulation and vibration damping. A Silicone rubber washer is prized for its high-temperature performance and flexibility, contributing to sealing electronic devices and preventing the ingress of moisture. A Cork rubber washer offers natural insulating properties and finds applications in electrical systems where preventing electrical conductivity is essential. The use of rubber washers in electronics ensures the longevity and reliability of electronic components.

Industrial Machinery 

The rubber washer is also used in industrial machinery to enhance durability and provide effective sealing solutions. Nitrile rubber washers, resistant to oil and fuel, contribute to the longevity of machinery components by preventing contamination. Bonded rubber washers, combining the flexibility of rubber with a metal core, offer enhanced stability in heavy-duty equipment. The versatility of rubber washer materials ensures that they can meet the specific demands of diverse industrial applications. 

Neoprene Rubber Washer
Off-The-Shelf Neoprene Rubber Washers

Where to Buy a Rubber Washer 

When it comes to acquiring a rubber washer for your project, look no further than our easy-to-use online shop. We offer a vast standard range of general purpose rubber washers, manufactured from high-quality neoprene rubber, offering a reliable solution for a multitude of applications. Engineered to meet industry standards and ensure our optimal performance, our neoprene rubber washer range is available in almost any size including M4, M5, M6, M8, M10, M12, M16 and M20, different thicknesses and external diameters to meet your project requirements. 

In addition to our standard range, we offer bespoke manufacturing services upon request. With access to state-of-the-art manufacturing machinery, decades of experience and an unrivalled dedication to technical projects, choose Delta Rubber Limited for your rubber washer needs. Whether you need a one-off rubber washer for a specialist application or require large-volume orders, our bespoke manufacturing service ensures you get the exact rubber washer solution, manufactured from your chosen material and tailored to your needs. 

If you require Rubber O-rings for your project, check our convenient rubber O-ring kits, containing over 400 high-quality Nitrile O-rings. Available in both Metric and Imperial sizes, the kits contain 30 different sized components, all housed in a handy hard storage case.