O-Ring Cord
O-ring cord is a versatile sealing solution used to manufacture custom-sized O-rings for maintenance, repair and OEM applications. Available in a wide range of diameters and elastomer compounds, it provides a practical alternative when a standard O-ring size is unavailable, or a bespoke seal is required.
At M Seals, we supply high-quality O-ring cord by the metre in materials including NBR, HNBR, EPDM, Silicone, Neoprene (CR) and FKM. We also manufacture custom vulcanised O-rings for non-standard sizes, helping customers achieve reliable sealing performance across a wide range of industrial applications.
Whether you need cord for maintenance, OEM production or custom O-ring manufacture, our team can help you select the right material and specification for your application.
Buy O-Ring Cord
Extruded O-ring cord is available by the metre in a wide range of materials and diameters from 1mm to 30mm.
For any sizes or materials not available directly on the webshop, please contact us for a quotation.
What Is O-Ring Cord?
O-ring cord is an extruded elastomer sealing material with a circular cross-section. It is commonly used to create bespoke O-rings for non-standard glands, large-diameter applications or maintenance repairs where replacement seals are difficult to source.
The cord can be cut to length and joined using adhesive bonding or vulcanisation techniques to create an endless ring. This allows engineers to produce custom seals quickly and cost-effectively without the lead times associated with moulded O-rings.
Available O-Ring Cord Materials
We supply O-ring cord in a wide range of elastomer compounds to suit different temperatures, chemicals and operating environments.
MATERIAL KEY PROPERTIES TYPICAL APPLICATIONS NBR (Nitrile) Excellent resistance to oils, fuels and hydraulic fluids Hydraulic and pneumatic systems EPDM Excellent resistance to water, steam, UV and ozone Water treatment, HVAC and outdoor equipment Silicone Wide temperature range and food-grade options Food processing, medical and electrical applications FKM (Viton®) High temperature and chemical resistance Automotive, aerospace and chemical processing HNBR Enhanced temperature, wear and oil resistance Automotive and heavy-duty industrial equipment Neoprene Good weathering, ozone and refrigerant resistance Refrigeration, HVAC and marine applications O-Ring Cord Tolerances
Standard O-ring cord is manufactured to ISO 3302-1 tolerances. For applications requiring greater dimensional accuracy, M Seals also offers premium cord manufactured to ISO 3601-1 tolerances.
This high-precision material is used for our M-Quick vulcanised O-rings, delivering performance comparable to moulded O-rings. FDA, 3-A and USP compliant materials are available, with certification provided on request.
Benefits of Using O-Ring Cord
O-ring cord offers a number of advantages across industrial sealing applications:
- Ideal for creating custom-sized O-rings
- Available in a wide range of materials and diameters
- Cost-effective alternative to moulded seals
- Suitable for emergency repairs and maintenance
- Easy to cut, join and install
- Available in continuous lengths or custom vulcanised rings
Common Applications
O-ring cord is commonly used in:
- Pumps and valves
- Hydraulic and pneumatic systems
- Water treatment equipment
- Food and beverage processing
- Chemical processing plants
- Marine, agricultural and industrial machinery
Custom Vulcanised O-Rings
For larger diameters or non-standard sizes, M Seals can manufacture custom vulcanised O-rings from a wide range of cord materials. Custom-manufactured seals provide a reliable sealing solution where standard O-ring sizes are unsuitable or unavailable.
Our experienced technical team can assist with material selection, dimensional requirements and application-specific recommendations to ensure optimal sealing performance.
FAQs
What is O-ring cord used for?
O-ring cord is used to manufacture custom-sized O-rings for sealing applications where a standard O-ring is unavailable or unsuitable. It is commonly used in pumps, valves, hydraulic systems and industrial machinery.
How do you join O-ring cord?
O-ring cord can be joined using adhesive bonding or vulcanisation techniques to create custom-sized O-rings. Vulcanised joints generally provide the strongest and most reliable sealing performance.
Can O-ring cord be supplied by the metre?
Yes. O-ring cord is available in a wide range of diameters and can be supplied by the metre or in longer coil lengths to suit your requirements.
Does M Seals manufacture custom vulcanised O-rings?
Yes. We manufacture custom vulcanised O-rings in a variety of materials and sizes, providing a reliable alternative to moulded seals for bespoke applications.
