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Premium FKM & Silicone O-Ring Seals from China

High-performance rubber sealing solutions engineered for extreme conditions — heat, oil, ozone, and chemicals. Trusted by industries worldwide.

About Ningbo Robon Sealing Co., Ltd.

We are a leading manufacturer and exporter of high-quality rubber sealing products based in Ningbo, Zhejiang, China. With a strong commitment to excellence, we specialize in FKM O Ring Seals, Silicone O Ring Seals, NBR O Rings, EPDM Rubber O Rings, PTFE Gaskets, and custom molded rubber parts.

Our mission is to deliver reliable, durable, and precision-engineered sealing solutions that meet international standards including AS568, FDA, and military specifications. Quality is our top priority — from raw material selection to final inspection.

AS568 Standard Compliance
FDA & Industrial Grade Materials
Global Export Experience
Custom Sizes & Materials
Silicone O-Rings

Our Premium Sealing Products

Engineered for performance, durability, and reliability in demanding environments — from automotive to aerospace, medical to heavy machinery.

AS568 FKM 60 Shore O-Ring

AS568 FKM 60 Shore Fluoroelastomer O-Ring

  • • Black FKM material for auto & industrial use
  • • Heat & ozone resistant up to 200°C
  • • Oil, fuel, and chemical resistance
  • • Meets AS568 standard dimensions
High Temp Silicone O-Ring

AS568 High Temp 60 Shore White Silicone O-Ring

  • • White silicone for high-temperature sealing
  • • Operates from -60°C to +230°C
  • • FDA-compliant for food & medical use
  • • Excellent flexibility and aging resistance
High Abrasion NBR O-Ring

High Abrasion Resistance Nitrile O-Ring

  • • Red or black NBR rubber
  • • Oil and fuel resistant
  • • Wide working temperature range
  • • Ideal for hydraulic and automotive systems
EPDM Rubber O-Ring

Weather Resistant EPDM Rubber O-Ring

  • • White or black EPDM material
  • • UV, ozone, and weather resistant
  • • Suitable for outdoor and automotive sealing
  • • FDA-approved options available
PTFE Ring Gasket

Expanded PTFE Ring Gasket

  • • White PTFE with excellent chemical resistance
  • • Low temperature resistance down to -200°C
  • • Electrical insulation & non-stick properties
  • • Custom sizes and backup rings available
70 Shore NBR O-Ring

Oil Resistant 70 Shore NBR O-Ring

  • • 23x2mm standard size
  • • High tensile strength and durability
  • • Used in automotive and industrial seals
  • • Excellent compression set resistance
Red FKM O-Ring Kit

Red AS568A FKM O-Ring Kit

  • • Complete aerospace-standard kit
  • • FKM material for high-performance use
  • • Heat, oil, and chemical resistant
  • • Precision molded for consistent sealing
Food Safe FDA O-Ring

Food Safe FDA White Rubber O-Ring

  • • FDA-compliant for food & beverage industry
  • • White silicone or EPDM material
  • • Cylindrical surface static sealing
  • • Non-toxic and odorless

Why Choose Our Seals?

Quality Assured

Every product undergoes strict quality control to ensure dimensional accuracy, material integrity, and performance reliability.

High Performance

Engineered for extreme temperatures, pressure, and chemical exposure — ideal for aerospace, automotive, and industrial applications.

Custom Solutions

We offer custom molding, cord extrusion, and gasket fabrication to meet your exact specifications and application needs.

Global Support

Trusted by customers worldwide. Fast response, reliable delivery, and technical support available in multiple languages.

10,000+
O-Ring Sizes Available
50+
Global Customers
15+ Years
Industry Experience
99.8%
Quality Pass Rate

Frequently Asked Questions

What materials do you offer for O-rings?

We offer FKM (Viton), Silicone (VMQ), NBR (Nitrile), EPDM, CR (Neoprene), and PTFE-based seals. Custom material blends are also available upon request.

Do you provide FDA-compliant O-rings?

Yes, we offer FDA-compliant silicone and EPDM O-rings suitable for food, beverage, and medical device applications.

Can you manufacture custom O-ring sizes?

Absolutely. We specialize in custom molding and extrusion for non-standard sizes, including O-ring cords and gaskets.

What standards do your O-rings meet?

Our products meet AS568, ISO 3601, and JIS B 2401 standards. We also comply with military and aerospace specifications when required.

What is your minimum order quantity (MOQ)?

MOQ varies by product and customization level. Contact us for specific pricing and volume discounts.

Get in Touch

Have questions about our O-rings or need a custom quote? Reach out to our team for expert support.

For inquiries, please visit our official website to send a message or request a callback.

Visit Official Website

Email: tiffany@rb-oring.com

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