O-Ring Cord Technical Guide


Choose the right cord, understand sizing, and avoid sealing problems.

O-Ring Cord Tolerances

Understand diameter variation, splice tolerances, and how they affect sealing performance.

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Round Cord (Inch)

Standard AS568 sizes for general sealing applications. The most common and versatile option.

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Square Cord

Ideal for static sealing where increased surface contact improves performance.

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Quad Ring Cord

X-profile design reduces friction and improves sealing in dynamic applications.

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Measurement Guide

Measure cord diameter correctly and avoid sizing mistakes.

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Spool Lengths

Standard spool sizes, cut lengths, and how to order the right quantity.

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Material Guide

Compare Buna, Viton®, EPDM, Silicone, and more based on temperature and chemical exposure.

Compare Materials

Cord vs Molded O-Rings

Know when to use cord and when a molded O-Ring is the better solution.

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Splicing Guide

Learn how to create O-Rings from cord using adhesives or vulcanizing.

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Groove Design

Compression, stretch, and gland design guidelines for reliable sealing.

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Chemical Resistance

Select the right material based on fluid compatibility and environment.

Check Compatibility

Cord vs Continuously Molded O-Rings

Know when to use cord and when a molded O-Ring is the better solution.

Learn