NITI Ventures

EPDM O-Rings

EPDM is widely used where sealing performance is needed in water-based environments or outdoor service. It is known for strong resistance to water, steam in suitable compounds, ozone, UV, weathering, and glycol-based fluids.

Typical temperature rangeAbout -40°C to +120°C typical, with some grades extending higher depending on formulation.

Other namesEPDM, Ethylene Propylene Diene Rubber

Hardness optionsCommon EPDM hardness options may include 60, 70, 80, and 90 Shore A.

Compliance optionsDepending on compound, EPDM may be available with FDA-compliant options, potable water related options, REACH / RoHS declarations, and other application-specific compliance.

Best used for

Water and hot water service
Steam in suitable compounds
Outdoor weather exposure
Ozone and UV exposure
Glycol-based brake fluid environments

Key advantages

Excellent resistance to water and many water-based fluids
Strong ozone resistance
Excellent UV and weathering resistance
Good heat aging performance

Performs well in

Water
Hot water
Steam in suitable formulations
Glycol-based brake fluids
Ozone
UV and weather exposure
Many polar environments

Use with caution or avoid

Petroleum oils
Mineral oils
Greases
Diesel and fuel systems
Hydrocarbon-rich applications unless compatibility is specifically confirmed

Typical applications

Water systems
Hot water systems
Brake systems using glycol-based fluids
Outdoor equipment
Weather-exposed seals
General industrial sealing in non-petroleum service

Common industries

Water treatment
Utilities
Outdoor equipment
Construction-related sealing
General industrial equipment exposed to weather

When to choose EPDM

Choose EPDM when you need water resistance, hot water resistance, weather and ozone resistance, outdoor durability, or glycol-based brake fluid compatibility.

When not to choose EPDM: Avoid or review carefully when your application involves oils, fuels, grease, petroleum-based hydraulic media, or hydrocarbon-heavy industrial environments.

Selection guide

This is a practical selection guide. Final material choice should always be checked against actual fluid, temperature, pressure, movement, environment, and any approval requirement for the exact compound.

Other materials

Need help selecting the right material?

Tell us your fluid, temperature, pressure, size, and whether the seal is static or dynamic. We can help review the most suitable starting options before final size and compound selection.