O-Ring Cord Stock

O-ring cord stock provides cut-to-length material for creating custom seals, filling gaps, and lining channels when a tailored fit is needed. Maintenance, repair, plumbing, and fabrication teams use silicone and Buna-N cord for sealing work in gaps, channels, and dynamic applications.

Product Display:
Helpful Buying Guide

How to Choose O-Ring Cord Stock

Select cord stock by matching the material, profile, cross section, and available length to the sealing task. The available range includes soft silicone cord for conforming to uneven surfaces, durable hard Buna-N cord, and Buna-N X-profile cord for dynamic applications requiring two sealing points and reduced drag.

Visual Guide

Popular examples in this category

Soft Buna-N Rubber O-Ring Cord, 0.275 in. Cross Section, 25 ft. LengthSoft Buna-N Rubber O-Ring Cord, 0.275 in. Cross Section, 25 ft. LengthWBB2270479Soft FDA Silicone Rubber Cord, 0.139 in. Cross Section, 100 ft. LengthSoft FDA Silicone Rubber Cord, 0.139 in. Cross Section, 100 ft. LengthWBB2266617Soft Red Silicone Rubber O-Ring Cord, 0.139 in. Cross Section, 10 ft. LengthSoft Red Silicone Rubber O-Ring Cord, 0.139 in. Cross Section, 10 ft. LengthWBB2302823Soft Silicone Rubber Cord, 0.070 in. Cross Section, 10 ft. LengthSoft Silicone Rubber Cord, 0.070 in. Cross Section, 10 ft. LengthWBB2302825
Use Cases

Create seals that fit the job

Use cord stock to create custom seals, fill gaps, line channels, and cut material to project-specific lengths. Some Buna-N options are intended for dynamic applications.

How to Choose

Match material and dimensions

Compare silicone or Buna-N material, then select the cross section that fits the relevant gap, channel, or sealing profile. Confirm the listed length and any minimum order quantity.

Applications

Support maintenance and fabrication

These cords are used in maintenance, repair, plumbing, and fabrication work where a standard preformed seal may not fit or where custom sizing is required.

Additional Information

Consider profile, color, and exposure

Silicone options are commonly red for visual identification and are described as resistant to UV exposure, chemicals, mild oils, and water. Buna-N options offer oil, chemical, heat, or water resistance depending on the cord.

1 mm–3/8 in.Cross-section range

Available cord profiles span metric and inch-based sizes.

10–100 ft.Length range

Choose short or extended stock for cut-to-length work.

2Core materials

The range includes silicone rubber and Buna-N rubber.

2 pointsX-profile sealing

X-profile Buna-N cord creates two sealing points.

Comparison Guide

Compare O-Ring Cord Stock Types

Use the cord material and profile to narrow choices before selecting cross section, length, and required order quantity.

Silicone Rubber CordSoft Buna-N / X-Profile CordHard Buna-N Cord
Best suited forCustom seals, gaps, channels, and uneven surfacesDynamic sealing applications requiring reduced drag and two sealing points on applicable options; custom sealing work on soft Buna-N cord options also supports oil, chemicals, and heat resistance
Material detailsSoft, compressible material; listed silicone options resist UV exposure, chemicals, mild oils, and waterBuna-N options resist oil, mild chemicals, and water; the soft Buna-N option lists oil, chemical, and heat resistance
Available formats representedRed cord; 1 mm, 3 mm, 0.070 in., 0.139 in., 0.250 in., and 0.313 in. cross sections; 10 ft. or 100 ft. lengths0.275 in. cross section; 10 ft. or 25 ft. lengths; X-profile or thin sealing lips on applicable options
Durability and fitCompresses readily to conform to uneven surfacesThin sealing lips help reduce drag in dynamic applications on applicable options
Hard, durable cord; 0.275 in. or 3/8 in. cross sections; 10 ft. or 100 ft. lengths; black finish availableOrder considerationSome options have stated minimum quantities of 3, 4, or 7 EA; others do not list a minimum in the summaries provided or have a minimum of 1
Planning Guide

Plan the right fit before choosing

Start With the Sealing Task

Choose cord suited to the application

For gap filling, channel lining, and custom seals on uneven surfaces, soft silicone cord offers a compressible profile that conforms readily. For sealing work where durability is important, hard Buna-N cord provides a firmer option. For dynamic applications, X-profile Buna-N cord and the soft Buna-N option with thin sealing lips provide two sealing points while helping reduce drag.

  • Use soft silicone for fitted seals, gaps, and channels.
  • Choose hard Buna-N when a more durable cord option is needed.
  • Consider X-profile Buna-N for dynamic sealing applications.
Confirm the Size and Quantity

Match cross section and length to your work

Cross section is a primary fit factor for compatible gaps, channels, and sealing profiles. Available sizes include 1 mm, 3 mm, 0.070 inch, 0.139 inch, 0.250 inch, 0.275 inch, 0.313 inch, and 3/8 inch. Lengths range from 10 feet to 100 feet, with one 25-foot option. Several products also have stated minimum order quantities.

  • Use slimmer 1 mm, 3 mm, 0.070 inch, or 0.139 inch profiles where a compact cord profile is required.
  • Consider 0.250 inch, 0.275 inch, 0.313 inch, or 3/8 inch options for compatible larger gaps or channels.
  • Choose 10-foot, 25-foot, or 100-foot stock based on the amount of cut-to-length material needed.
Compare Material Characteristics

Review exposure and identification needs

Silicone rubber cord is described for applications involving UV exposure, chemicals, mild oils, or water, and the red finish helps distinguish many silicone options during installation and storage. Buna-N cord is described as resistant to oil, mild chemicals, and water; one soft Buna-N option also lists heat resistance. Food-grade material is identified on one 0.139-inch silicone cord option.

  • Red silicone cord supports visual identification.
  • Black is available on hard Buna-N cord.
  • Review the individual product details when material purity or a specific exposure is important.
FAQ

Common questions before buying

What is O-ring cord stock used for?

It is used to create custom seals, fill gaps, and line channels in maintenance, repair, plumbing, and fabrication work.

How do I select a cord cross section?

Match the listed cross section to the compatible gap, channel, or sealing profile in your application.

What is the difference between silicone and Buna-N cord?

Silicone cord is soft and compressible for fitted sealing work, while Buna-N options provide oil, chemical, and water resistance; hard Buna-N is a more durable option.

Are all cord options sold in the same quantity?

No. Listed minimum order quantities vary by product, including 1, 2, 3, 4, or 7 EA on certain options.

Helpful Buying Guide

How to Choose O-Ring Cord Stock

Select cord stock by matching the material, profile, cross section, and available length to the sealing task. The available range includes soft silicone cord for conforming to uneven surfaces, durable hard Buna-N cord, and Buna-N X-profile cord for dynamic applications requiring two sealing points and reduced drag.

Visual Guide

Popular examples in this category

Soft Buna-N Rubber O-Ring Cord, 0.275 in. Cross Section, 25 ft. LengthSoft Buna-N Rubber O-Ring Cord, 0.275 in. Cross Section, 25 ft. LengthWBB2270479Soft FDA Silicone Rubber Cord, 0.139 in. Cross Section, 100 ft. LengthSoft FDA Silicone Rubber Cord, 0.139 in. Cross Section, 100 ft. LengthWBB2266617Soft Red Silicone Rubber O-Ring Cord, 0.139 in. Cross Section, 10 ft. LengthSoft Red Silicone Rubber O-Ring Cord, 0.139 in. Cross Section, 10 ft. LengthWBB2302823Soft Silicone Rubber Cord, 0.070 in. Cross Section, 10 ft. LengthSoft Silicone Rubber Cord, 0.070 in. Cross Section, 10 ft. LengthWBB2302825
Use Cases

Create seals that fit the job

Use cord stock to create custom seals, fill gaps, line channels, and cut material to project-specific lengths. Some Buna-N options are intended for dynamic applications.

How to Choose

Match material and dimensions

Compare silicone or Buna-N material, then select the cross section that fits the relevant gap, channel, or sealing profile. Confirm the listed length and any minimum order quantity.

Applications

Support maintenance and fabrication

These cords are used in maintenance, repair, plumbing, and fabrication work where a standard preformed seal may not fit or where custom sizing is required.

Additional Information

Consider profile, color, and exposure

Silicone options are commonly red for visual identification and are described as resistant to UV exposure, chemicals, mild oils, and water. Buna-N options offer oil, chemical, heat, or water resistance depending on the cord.

1 mm–3/8 in.Cross-section range

Available cord profiles span metric and inch-based sizes.

10–100 ft.Length range

Choose short or extended stock for cut-to-length work.

2Core materials

The range includes silicone rubber and Buna-N rubber.

2 pointsX-profile sealing

X-profile Buna-N cord creates two sealing points.

Comparison Guide

Compare O-Ring Cord Stock Types

Use the cord material and profile to narrow choices before selecting cross section, length, and required order quantity.

Silicone Rubber CordSoft Buna-N / X-Profile CordHard Buna-N Cord
Best suited forCustom seals, gaps, channels, and uneven surfacesDynamic sealing applications requiring reduced drag and two sealing points on applicable options; custom sealing work on soft Buna-N cord options also supports oil, chemicals, and heat resistance
Material detailsSoft, compressible material; listed silicone options resist UV exposure, chemicals, mild oils, and waterBuna-N options resist oil, mild chemicals, and water; the soft Buna-N option lists oil, chemical, and heat resistance
Available formats representedRed cord; 1 mm, 3 mm, 0.070 in., 0.139 in., 0.250 in., and 0.313 in. cross sections; 10 ft. or 100 ft. lengths0.275 in. cross section; 10 ft. or 25 ft. lengths; X-profile or thin sealing lips on applicable options
Durability and fitCompresses readily to conform to uneven surfacesThin sealing lips help reduce drag in dynamic applications on applicable options
Hard, durable cord; 0.275 in. or 3/8 in. cross sections; 10 ft. or 100 ft. lengths; black finish availableOrder considerationSome options have stated minimum quantities of 3, 4, or 7 EA; others do not list a minimum in the summaries provided or have a minimum of 1
Planning Guide

Plan the right fit before choosing

Start With the Sealing Task

Choose cord suited to the application

For gap filling, channel lining, and custom seals on uneven surfaces, soft silicone cord offers a compressible profile that conforms readily. For sealing work where durability is important, hard Buna-N cord provides a firmer option. For dynamic applications, X-profile Buna-N cord and the soft Buna-N option with thin sealing lips provide two sealing points while helping reduce drag.

  • Use soft silicone for fitted seals, gaps, and channels.
  • Choose hard Buna-N when a more durable cord option is needed.
  • Consider X-profile Buna-N for dynamic sealing applications.
Confirm the Size and Quantity

Match cross section and length to your work

Cross section is a primary fit factor for compatible gaps, channels, and sealing profiles. Available sizes include 1 mm, 3 mm, 0.070 inch, 0.139 inch, 0.250 inch, 0.275 inch, 0.313 inch, and 3/8 inch. Lengths range from 10 feet to 100 feet, with one 25-foot option. Several products also have stated minimum order quantities.

  • Use slimmer 1 mm, 3 mm, 0.070 inch, or 0.139 inch profiles where a compact cord profile is required.
  • Consider 0.250 inch, 0.275 inch, 0.313 inch, or 3/8 inch options for compatible larger gaps or channels.
  • Choose 10-foot, 25-foot, or 100-foot stock based on the amount of cut-to-length material needed.
Compare Material Characteristics

Review exposure and identification needs

Silicone rubber cord is described for applications involving UV exposure, chemicals, mild oils, or water, and the red finish helps distinguish many silicone options during installation and storage. Buna-N cord is described as resistant to oil, mild chemicals, and water; one soft Buna-N option also lists heat resistance. Food-grade material is identified on one 0.139-inch silicone cord option.

  • Red silicone cord supports visual identification.
  • Black is available on hard Buna-N cord.
  • Review the individual product details when material purity or a specific exposure is important.
FAQ

Common questions before buying

What is O-ring cord stock used for?

It is used to create custom seals, fill gaps, and line channels in maintenance, repair, plumbing, and fabrication work.

How do I select a cord cross section?

Match the listed cross section to the compatible gap, channel, or sealing profile in your application.

What is the difference between silicone and Buna-N cord?

Silicone cord is soft and compressible for fitted sealing work, while Buna-N options provide oil, chemical, and water resistance; hard Buna-N is a more durable option.

Are all cord options sold in the same quantity?

No. Listed minimum order quantities vary by product, including 1, 2, 3, 4, or 7 EA on certain options.

!