High Performance EPDM O Ring, Standard & Custom Size Rubber O-Ring, Hot Water & Steam Resistant, NBR FKM Silicone Alternative for Static & Light Dynamic Sealing

The EPDM O-ring is an elastomer seal manufactured from ethylene propylene diene monomer (EPDM) rubber. It delivers outstanding resistance to ozone, UV light, weathering, hot water, and steam, making it a reliable choice for demanding sealing environments. We supply EPDM O-rings in a wide range of standard and custom sizes and hardness levels. Alternative rubber materials — including NBR, FKM, and Silicone — are available to suit different working conditions. EPDM O-rings are widely used for static and light dynamic sealing, particularly in water, steam, and outdoor applications. They are not suitable for mineral oil, grease, or hydrocarbon solvents.

• Made from premium EPDM raw rubber with excellent elasticity and resilience.
• Superior ozone, UV, and weather resistance with excellent anti-aging performance for long-term outdoor service.
• Resistant to hot water and steam — ideal for hot water and steam media sealing.
• Low compression set maintains stable sealing performance after prolonged compression.
• Available in standard sizes; custom sizes and hardness levels are supported.
• Easy installation and replacement for efficient equipment maintenance.

• Static and light dynamic sealing for HVAC systems, water pipelines, and plumbing equipment.
• Sealing for water treatment devices, hot water boilers, and steam equipment.
• Automotive cooling systems, radiators, and coolant circuit sealing.
• Outdoor machinery, pumps, valves, and pipe flange sealing.
• Sanitary equipment, food machinery, and general industrial maintenance.

We can manufacture O-rings in colors according to customer requirements. If you need colored O-rings, simply provide a Pantone number and we will match it. In addition to EPDM, we offer NBR, FKM, and Silicone materials to meet the demands of different working conditions.

We also produce a comprehensive range of rubber seals, including:

• Automotive rubber seals
• Connector rubber seals
• Power tool rubber seals
• Valve rubber seals
• Pipe rubber seals
• Semiconductor rubber seals
• Hydraulic and pneumatic rubber seals
• Pump rubber seals
• Oil and gas seals
• Food-grade rubber seals
• Medical rubber seals
• Chemical equipment rubber seals

1. Since 2006, focused on rubber seals, especially for auto parts.
2. Certificates: ISO9001, IATF16949, ISO14001, ISO45001, ISO 13485.
3. Two factories covering more than 18,000㎡, including a 600㎡ clean room, with 300 workers.
4. Over 10,000 mold sets, including approximately 5,000 O-ring molds.
5. O-ring series covers American standard (AS568), Japanese standard (JIS), national standard (GB), and a large number of customized non-standard parts.
6. Materials: NBR, FKM, SIL, EPDM, CR, NR, PU, HNBR, FFKM, SBR. All rubber materials meet ROHS 2.0 and REACH 235 requirements.
7. Material certificates: FDA, ROHS, REACH, UL157, CP65, WRC, EN549, EN45545.
8. Products are widely used in automotive parts, electronic connectors, valves, pneumatics, power tools, new energy, medical equipment, electronic products, and other fields.
9. The company has introduced HRP, ERP, and other management systems since its inception.
10. Labor cost, raw material procurement, production process, and product quality are comprehensively and scientifically controlled.

• Professional OEM & ODM — 30+ years of rubber sealing manufacturing experience
• Full range of molds — over 10,000+ sets
• Professional team providing efficient trading service
• Strict quality control — quality guarantee
• Owned testing laboratory with sophisticated test equipment
• Advanced equipment: 50+ curing machines, 8 CCD automatic inspection machines, 8 all-in-one machines

Ruichen has cooperated with many superior customers worldwide. We maintain a complete system and excellent productivity to serve you reliably.

We provide rubber manufacturing technology consultation and product R&D services (OEM & ODM):

1. Competitive mold fees.
2. Rubber molding for a wide range of sizes and shapes — custom fabrication possible.
3. Custom personalized logo accepted.
4. Over 10,000 types of custom molded rubber products established and refined.
5. Various materials: Silicone, EPDM, NBR, FKM (Viton), HNBR, NR, Neoprene (CR), SBR, MPU, and more.
6. Different hardness levels: 30 to 90 Shore A.
7. Various colors: translucent, black, white, blue, green, red, and more.

Many large companies select RUICHEN for their rubber seals and customized rubber parts because we consistently satisfy them in quality, price, delivery, and service. We also attach great importance to small customers in niche markets — whether your purchase quantity is large or small, you are a valuable partner to us.