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Nuclear Grade EPDM (Ethylene Propylene) Selection Guide

Nuclear grade EPDM (Ethylene Propylene Diene Monomer) is a specialized form of the synthetic rubber designed specifically for applications within the nuclear industry. This type of EPDM is tailored to meet stringent requirements for radiation resistance and thermal stability. This webpage discusses the various types of nuclear grade EPDM, their benefits and limitations, and their industrial applications, with an emphasis on the manufacture of O-rings, gaskets, and custom parts.


The engineers and consultants here at Canyon Components take pride in finding the perfect seal to suit our customer’s needs. Contact our expert staff for assistance with any seal or application questions!


Common names include: EPDM (Ethylene-propylene diene monomer), EP Trade Names: Nordel®, Epcar®, Epsyn®, Vistalon®, Royalene®, Vistalon®

Nuclear Grade EPDM O-ring

Custom Parts - Any Material

Standard EPDM

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Nuclear Grade EPDM O-ring

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Features of Nuclear Grade EPDM

  • Radiation Resistance: Specifically designed to resist degradation from gamma radiation, ensuring long-term performance and reliability.

  • Thermal Stability: Maintains its mechanical properties across a wide range of temperatures, crucial for the varying conditions in nuclear power plants.

  • Chemical Resistance: Offers excellent resistance to a variety of chemicals, including alkaline and acidic environments, which are commonly encountered in nuclear processes.

  • Flexibility and Durability: Even under extreme conditions, nuclear grade EPDM retains its flexibility, making it ideal for producing O-rings, gaskets, and custom parts that require a durable seal.

Limitations of Nuclear Grade EPDM

  • Cost: The specialized formulation and testing requirements make nuclear grade EPDM more expensive than standard EPDM.

  • Limited Resistance to Petroleum Oils: Like standard EPDM, the nuclear grade does not perform well when exposed to petroleum-based oils and fuels, which can limit its use in certain applications.

  • Color Degradation: Under intense radiation, EPDM can discolor; however, this cosmetic change does not typically affect the material's performance.

Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.

Industrial Usage of Nuclear Grade EPDM

Nuclear grade EPDM is a critical material in the nuclear industry, offering unmatched performance in some of the most challenging environments. Materials like Canyon Component EP75BK28 is tested to EN 14582 to prove it's compatibility with nuclear applications. Its ability to produce effective O-rings, gaskets, and custom parts that can withstand radiation, heat, and chemical exposure makes it indispensable. While it comes with higher costs and some limitations in oil resistance, the advantages of using nuclear grade EPDM in terms of safety and reliability often outweigh these concerns. As nuclear technology evolves, the role of nuclear grade EPDM continues to expand, enhancing safety and efficiency in nuclear applications worldwide.

Canyon Components strives to meet all customer service requests. Feel free to contact Canyon Components engineering and let our knowledgeable staff help you design the perfect part for your needs.

Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.

Essential for O-rings, gaskets, and custom parts that must withstand high levels of radiation and heat within reactor cores.

Nuclear Reactors

Used in seals and hoses within nuclear plant cooling systems, where stability under thermal cycling is critical.

Cooling Systems

Employed in containment systems that store or transport radioactive waste, providing reliable sealing capabilities to prevent leaks.

Waste Management

Forms components of protective gear and maintenance tools that require radiation resistance to ensure worker safety and equipment longevity.

Maintenance and Safety Equipment

Used in experimental setups and research reactors, where its resistance to a wide range of experimental conditions is vital.

Research Facilities


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