O-Ring Cord Extruded Seals

O-ring cord is a continuous, extruded length of elastomeric material with a circular cross-section, used to fabricate custom-sized O-rings for static sealing applications where standard O-rings may not fit. The cord is cut to the required length and joined together using adhesive or vulcanization to form a complete seal.
Key Features and Benefits
Versatility in Size: O-ring cord can be cut to any length, providing a flexible solution for non-standard or large-diameter sealing requirements without the need for expensive custom molding tools.
Cost-Effectiveness: It is a more cost-effective option for low-volume, custom seals compared to procuring a unique molded O-ring for every size.
Reduced Inventory: Businesses can stock a few types of cord material and cross-sections rather than a vast inventory of every conceivable O-ring size.
Quick Repairs: Enables fast, on-site fabrication of replacement seals, minimizing downtime during maintenance and repairs.
Suitable for Static Applications: Seals made from cord are generally best used in static (non-moving) applications, as the joint is typically the weakest point.
Common Materials
O-ring cord is available in various elastomers to suit different environmental and application needs. Common options include:
Nitrile (NBR): Known for oil and fuel resistance.
Viton® (FKM): Ideal for high temperatures and aggressive chemicals.
EPDM: Offering resistance to heat, water, and ozone.
Silicone (VMQ): Suitable for extreme temperatures and often used in food and medical applications.
PTFE: Offers exceptional chemical resistance and a wide temperature range, though it has low elasticity.