Custom O-Rings

Request A Quote

Rocket Seals is an industry leader in the production of custom O-rings. Also known as a packing or toric joint, an O-ring is a gasket in the shape of a torus or doughnut that is designed to prevent the passage of liquids or gasses.  It is a loop of elastomer with a round cross-section that is seated in a groove to form a seal.  Typically, O-rings rest in the middle of a gland until pressure begins to rise in the sealing system.  When this happens the O-ring shifts away from the pressure and is squeezed to fill the hole between the two mating hardware pieces.  O-rings can be employed in both static or dynamic applications. 

Custom O Ring Materials

As a custom O-ring distributor, Rocket Seals has an extensive range of materials.  This includes common material to more exotic grades designed for specialty applications. We also have the ability to get materials for specific client requests when necessary.  The list of materials we commonly stock includes:

Viton (FKM)

PTFE Encapsulated (Silicone or Viton)


Polyacrylate Rubber


Kalrez, Chemraz, Simriz (FFKM)

Ethylene Propylene Diene Monomer


Silicone (SiR)

Aflaz (TFE/P)

Ethylene Propylene Rubber


Highly Saturated Nitrile (HSN)

Butadiene Rubber


Silicone Rubber

Custom compounds and formulations

Butyl Rubber

Nitrile Rubber

Styrene-Butadiene Rubber

PTFE Coated (Silicone or Viton)

Chlorosulfonated Polyethylene 



Custom ORingsApplications For Custom Orings

At Rocket Seals, We fabricate custom O-rings for a variety of applications.  Our extensive list of materials with their various natural resiliencies each is designed for specific purposes.  Common applications we manufacture O-rings for include:

  • Washers and Seals for Electronics, Electrical Equipment, and Food Processing
  • Equipment
  • Electrical Connector Seals
  • Automotive Electrical Enclosure Weather Seals
  • Outdoor Electrical Enclosures
  • Outdoor Cellular Telecommunications Enclosures
  • Water Purification Systems
  • Medical Equipment Seals
  • Dairy Fluid Handling
  • Customizability


At Rocket Seals, we have been distributing & specifying the manufacture of O-rings for over fifty years.  At this time, we have worked with a wide range of industries and hundreds of companies within those industries.  This has allowed us to learn how to fabricate O-rings for a wide range of purposes.  Industries in which O-rings are often used in include:

  • Electronics
  • Automotive
  • Agriculture
  • Food & Beverage
  • Manufacturing

As a custom O-ring supplier, Rocket Seals provides O-rings with high customizability.  This includes a wide range of colors and sizes.  An extensive range of standard and metric sizes are available in Shore "A" hardnesses from 40 to 90.  There are also a variety of cord cross-sections available from 0.070" to 1".  Dimensional tolerances depend upon the size and production method. Our manufacturing partners’ custom compound formulation techniques allow for exact performance that is also cost-efficient. We are a complete one-stop-shop for extruded and molded elastomers.  Our capabilities and ranges for custom O-rings include:

  • Multiple Durometer/Hardness Types
  • Multiple Material Colors
  • 0.010 inch to 3 Inch Plus Cross Section
  • Custom Formulation for Mechanical Properties, Chemical Resistance & Temperature Resistance
  • Bonding
  • Special Packaging



Get A Quote


If you have any questions, please fill out the form below and a Rocket Seals technical expert will get in touch with you shortly.

Yes, sign me up.

Need O-Rings or Other Seals Fast?


Rocket Seals is the leading distributor for O-Rings and many other seals.

Request a quote and have it shipped the same day!

Request A Quote