Why EPDM seals are the essential sealing solution for your products

From gaskets and washers to tapes and pads, discover the various EPDM seal properties across an impressive variety of applications, products, and industries.

Increasing industrialisation and urbanisation drive the demand for high-quality sealing products, ensuring safety, reliability, and longevity for various systems. For this reason, EPDM seals are popular across multiple industries, but do they have the right properties to support your needs?

In this blog, we explore the vast capabilities of EPDM seals, with material descriptions, properties and application examples to see whether EPDM seals the deal for your business.

From gaskets and washers to tapes and pads, discover the various EPDM seal properties across an impressive variety of applications, products and industries.

What are EPDM seals?

Available in rubber or sponge variations, EPDM seals are used across multiple industries for numerous sealing applications. EPDM provides a durable elastomer alongside having conformable and impermeable qualities ideal for sealing solutions. Valued for its flexibility, durability, and longevity in different environmental conditions, EPDM can be manufactured for different sealing applications with excellent resistance across temperatures, weathering, moisture, ozone, chemicals and UV radiation.

What are EPDM seals?

EPDM translates to “ethylene propylene diene monomer”. First developed in 1962 by Karl Ziegler, EPDM is a copolymer with two main components, ethylene and propylene, derived from oil and natural gas, making EPDM a synthetic rubber compound.   

The ethylene, propylene and diene monomers are polymerised, forming a durable and versatile rubber material. Specific chemical compositions for EPDM seals may vary depending on the manufacturer and intended applications.

8 EPDM seal material properties

In having numerous applications across multiple industries, EPDM seal materials come with various advantages. The main properties of EPDM seals include:

1. Weather resistance

EPDM seals provide superb weathering across ozone, UV radiation, moisture and extreme temperature, making it an excellent choice for outside applications.

2. Chemical resistance

EPDM seals provide impressive chemical resistance against various chemicals, including acids, alkalis, solvents and fluids.

3. Flexibility

The polymer structure enables EPDM seals to demonstrate excellent elasticity, providing a conformable material to suit multiple sealing applications while accommodating movement and vibration.

4. Temperature range

5. Water and steam resistance

EPDM seals demonstrate ideal water and steam resistance for applications in wet or steamy conditions by preventing leakage and maintaining sealing integrity within wet and humid environments.

6. Durability

With resistance to wear, abrasion, tearing and ageing, EPDM seals are a durable material that guarantees longevity for your applications.

7. Electrical insulation

EPDM seals also have sufficient electrical insulation properties to protect applications and operators from dangerous electricity hazards.

8. Low compression

What’s known as a “low compression set”, EPDM seals can maintain their form and original shape after compression.

What are EPDM seals used for?

EPDM seals are used for numerous applications across multiple industries, some of these examples include:

The automotive industry utilises EPDM seals in a range of applications, such as:

  • Door and window seals.
  • Gaskets.
  • Washers.
  • Belts.
  • O-rings.
  • Hoses.

Due to high temperature, moisture and petrochemical resistance, EPDM is an ideal sealant material for the automotive industry. From under-the-hood engine components to window and door seals, the automotive industry utilises EPDM seals across an application array thanks to its properties’ flexibility, resiliency and weathering ability.

By providing an excellent sealing solution in diverse environments, EPDM seals are prevalent in the construction industry. Some of these EPDM seal applications include:

  • Window and door seals.
  • Roofing membranes.
  • Expansion joints.
  • HVAC Systems.
  • Façade and curtain wall seals.
  • General waterproofing.

Reliability, durability, and versatility make EPDM seals an indispensable solution for various construction applications where high-performance sealing can prove an essential requirement across structural integrity, energy efficiency and comfort.

Water, chemical and temperature resistance makes EPDM seals an ideal, watertight solution prevalent in the plumbing industry. Here are a few application examples of EPDM seals used in plumbing:

  • Pipe seals and gaskets.
  • Faucet and shower seals.
  • Rubber washers.
  • Expansion joints.
  • Waterproofing membranes.

Reliable sealing is essential for this industry to maintain the integral functionality of its plumbing systems. Thanks to its prevailing properties, EPDM fits the bill in more ways than one.

We use EPDM seals in various electrical devices to seal enclosures, connectors and cable glands. This protection ensures your electrical applications resist dust, moisture and other environmental contaminants.  

EPDM electronic seal applications include:

  • Enclosures and gaskets.
  • Cable glands and connectors.
  • Lighting fixtures.
  • Conduits and fittings.
  • Switches and sensors.
  • Terminal blocks and busbars.
  • Battery enclosures.

EPDM seals also provide NVH (noise, vibration and harshness) qualities to serve fragile and intricate devices.

Due to their excellent material properties, EPDM seals are common in aerospace applications.

These applications include:

  • Aircraft doors and windows.
  • Gaskets and O-rings.
  • Access panel and hatch seals.
  • Cockpit and cabin seals.
  • Avionics and electronics.
  • Fuel tanks and fluid systems.
  • Aircraft interiors.
  • Aircraft exterior surface sealants.

A combination of environmental sealing resistance, longevity and high performance ensures EPDM seals provide a reliable solution for the aerospace industry.

Different medical applications use EPDM seals for applications with excellent properties across biocompatibility, chemical resistance and durability.

Here are EPDM seal application examples you can find in the medical industry:

  • Fluid handling systems.
  • Sterilisation equipment.
  • Medical packaging.
  • Laboratory equipment.
  • Implantable devices.
  • Medical gas systems.
  • Dental equipment.

With reliable sealing, fluid containment and protection for numerous medical equipment, devices and packaging, EPDM remains an excellent sealing solution for the industry.

EPDM seal products

Regardless of industry, conditions or environment, EPDM seals are available across an extensive product range with customisable variations available. Here at Ramsay Rubber, we provide bespoke, high-quality EPDM seal products to serve your application requirements:

Gaskets - EPDM Rubber Gaskets

EPDM Rubber Gaskets

Capabilities – Plain, self-adhesive, double-sided adhesive, kiss cut and perforated
Thicknesses – 1-10mm

Gaskets - EPDM Sponge gasket

EPDM Sponge Gaskets

Capabilities – Plain, self-adhesive, double-sided adhesive, kiss cut and perforated
Thicknesses - 1-64mm

Adhesive Strips - EPDM Rubber Strip

EPDM Rubber Strips

Capabilities – Plain, self-adhesive, double-sided and kiss cut
Thicknesses – 1-10mm

Adhesive Strips - EPDM Sponge Strip

EPDM Sponge Strips

Capabilities – Plain, self-adhesive, double-sided and kiss cut
Thicknesses - 1-64mm

EPDM Rubber Washers

Capabilities – Plain, self-adhesive, double-sided and kiss cut
Thicknesses – 1-10mm

Sealing Solutions - EPDM Sponge Washers

EPDM Sponge Washers

Capabilities – Plain, self-adhesive, double-sided and kiss cut (on a roll)
Thicknesses - 1-64mm

Adhesive Pads - EPDM Rubber Pads

EPDM Rubber Pads

Capabilities – Plain, self-adhesive, double-sided adhesive, kiss cut and perforated
Thicknesses – 1-10mm

Adhesive Pads - EPDM Sponge Pads

EPDM Sponge Pads

Capabilities – Plain, self-adhesive, double-sided adhesive, kiss cut and perforated
Thicknesses - 1-64mm

EPDM Rubber Cord

EPDM Rubber Cord

Diameter – 2- 25mm
Lengths (Dependent on diameter) – 100mm-25 meters

EPDM Sponge Cord

EPDM Spong Cord

Diameter – 2- 25mm
Lengths (Dependent on diameter) – 100mm-25 meters

Rolls & Sheeting - EPDM Sponge Roll

EPDM Sponge Rolls

Capabilities – Plain, self-adhesive
and double-sided adhesive rolls
Thicknesses – 1-64mm
Widths – 100mm-1 meter
Lengths – 5-20 meters

Adhesive Tapes - EPDM Sponge Tape

EPDM Sponge Tape

Capabilities – Self-adhesive and
double-sided adhesive
Thicknesses – 1-64mm
Widths – 5-50mm
Lengths – 1-10 meters

Rolls & Sheeting - EPDM Sponge Sheeting

EPDM Sponge Sheeting

Capabilities – Plain, self-adhesive
and double-sided adhesive rolls
Thicknesses – 1-64mm
Widths – 500mm-2 meters

Plus, with various capabilities across material slitting, adhesive laminating, fabrication and assembly, we can ensure you receive the perfect EPDM seal type to suit the unique specifications of your applications or devices

Speak to EPDM seal specialists

At Ramsay Cellular Sealing Solutions, we have a wealth of experience providing reliable, high-performance EPDM seal solutions across multiple industries. From gaskets and washers to strips and pads, as a UK industry leader with global accreditation, we ensure all our EPDM solutions are accredited with quality certifications from IATF 16949:2016, ISO 14001:2015, ISO 45001:2018 and ISO 9001:2015. Get in touch for more details about how EPDM seals can serve the needs of your business.

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Ramsay Rubber & Plastics Limited
Vulcan Road, Bilston
West Midlands WV14 7HT
T +44 (0) 1902 407150
F +44 (0) 1902 407160