Mr O-Ring 262 EPDM O-Ring 7in ID Pack of 25 - Durable EPDM Seal

In this review the Mr O-Ring 262 EPDM O-Ring pack is assessed for workshop and maintenance use; it is aimed at technicians and hobbyists who need reliable, weather-resistant seals in a commonly used AS568 size. The bottom line: this pack of 25 black EPDM o-rings delivers consistent dimensions and broad chemical and temperature resistance, making it a practical choice when long shelf life and predictable performance are priorities. The reviewer found the 70A durometer material to balance flexibility and compression set resistance for many static and low-dynamic sealing tasks.

Key Features

• 262 EPDM Compound: Provides strong resistance to ozone, sunlight and weathering, which helps seals last longer in outdoor and exposed applications.
• 70A Durometer: Offers a firm yet flexible cross-section that holds shape while permitting a good sealing contact under moderate compression.
• Nominal and Actual Dimensions: The listed 7in ID and 7-1/4in OD correspond closely to actual measurements, giving installers predictable fit in AS568-compatible grooves.
• Wide Temperature Range: Rated from -55C to 125C so it withstands cold starts and everyday elevated temperatures common in plumbing and HVAC tasks.
• Versatile Chemical Compatibility: Performs well in alcohols, dilute acids and alkalis, water, hydraulic fluids and silicone greases, making it suitable for many service environments.
• Pack Quantity: Supplied as a pack of 25 which reduces repeat orders and is convenient for workshop stocking and repetitive maintenance jobs.

Who It's For

These o-rings suit maintenance technicians, plumbers, HVAC installers and DIYers who need a dependable, weather-resistant EPDM seal in a common AS568 size. The pack of 25 is particularly useful for facilities or shops that perform routine seal replacements and want consistent parts on hand.

Those needing resistance to petroleum oils, aggressive hydrocarbons or continuous high-temperature exposure above 125C should look for a different elastomer, as EPDM is not optimized for such conditions.

Pros & Cons

Pros

• Consistent nominal and actual dimensions provide predictable fit in AS568 grooves.
• Good resistance to ozone, sunlight and weathering for outdoor or exposed uses.
• Wide compatibility with polar solvents, dilute acids/alkalis and many hydraulic fluids.
• Pack of 25 is cost-effective for frequent replacement or stocking.

Cons

• Not suitable for petroleum-based oils and some aggressive hydrocarbons, so it is limited in certain automotive or industrial oil-exposed applications.
• The 70A hardness may be firmer than preferred for ultra-low-pressure dynamic seals requiring very soft materials.

Specifications

Our Verdict

The Mr O-Ring 262 EPDM 7in ID pack of 25 is a practical choice for general-purpose sealing where weather, ozone and moderate chemical resistance matter. It offers dependable, AS568-compatible sizing and a useful temperature window at a reasonable value for workshops and maintenance teams, though users exposed to petroleum oils should select a different compound.

Frequently Asked Questions

Are these o-rings AS568 compatible?
Yes, the product is sized to meet AS568 standards and the nominal dimensions align with standard grooves.

Can these o-rings be used with automotive oils?
EPDM is not recommended for petroleum-based oils; choose a different elastomer for hydrocarbon exposure.

What environments do they withstand?
They resist ozone, sunlight, weathering, water, alcohols, dilute acids and many hydraulic fluids within the listed temperature range.