EPDM Rubber Washers - Industrial Grade Flat Washers

EPDM stands for Ethylene Propylene Diene Monomer, a type of synthetic rubber polymer. The monomer composition gives EPDM its outstanding resistance to heat, ozone, UV radiation, steam, and water-based fluids. This makes it one of the most versatile and durable elastomers for outdoor, sanitary, and general industrial sealing applications.

EPDM rubber washers from Detroit Sealing Components operate effectively within a temperature range of -55°C to 125°C (-67°F to 257°F). This broad range makes them suitable for cold-weather outdoor installations as well as elevated-temperature industrial applications such as steam lines, HVAC systems, and hot water plumbing.

Yes. EPDM formulations offered by Detroit Sealing Components can be certified to FDA CFR 177.2600, NSF 61, NSF 42, WRAS, and other international drinking water standards. These certifications confirm the materials are safe for contact with potable water and food-grade media, making them ideal for water treatment, beverage processing, and sanitary piping systems.

Yes. Detroit Sealing Components specializes in custom-designed EPDM washers. Using computer-aided design and finite element analysis, the engineering team can produce washers in non-standard sizes, specific cross-sections, or unique profiles. Custom orders are supported by the ISO 17025 accredited in-house lab to verify dimensional accuracy and material compliance before shipment.

EPDM rubber washers are used across a wide range of industries including automotive, construction, hydraulic and pneumatic systems, food and beverage, water treatment, agriculture, aerospace, renewable energy, and general manufacturing. Their resistance to weathering, chemicals, and water makes them a preferred choice wherever reliable sealing performance is critical.

Unlike O-rings with a round cross-section, EPDM washers have a flat, rectangular cross-section — sometimes called square-cut, lathe-cut, or square-ring profiles. This geometry allows them to fill sealing grooves more completely, reducing leakage risk. They offer greater design flexibility for face-seal and flange applications and can be customized more easily than standard O-ring profiles.