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Polyurethane Rings

Cast Polyurethane Rings

Tougher in a Wide Range of Applications

PSI produces cast polyurethane rings made from tough, premium grade urethane, which ensures they will hold up in a wide range of applications. With our urethane ring seals, you will reduce equipment downtime and save on material costs. PSI offers custom sizes, formulas, colors, and durometers (hardness). We also offer tight tolerances, ground finishes, and dual durometer rings.

PSI will help you develop prototypes and will deliver full production quantities when needed. Our custom rings have little or no tooling costs. PSI will custom formulate to meet your specific needs, including FDA wet or dry requirements.

Cast Polyurethane Double Durometer Rings

Cast Polyurethane Ring Specs

Durometer Hardness

  • 25 Shore OO
  • 40 Shore OO
  • 50 Shore OO
  • 70 Shore OO
  • 20 Shore A to 90 Shore A
  • 50 Shore D to 70 Shore D

Here is a list of our standard durometer specifications and our technical brief, to assist you with choosing the correct material.

Durometer Reference Calculator
Durometer Chart
Select Durometer
Select Hardness
shoe icon

For reference, this hardness is as soft as a Gel Shoe Insole

rubber band

For reference, this hardness is as soft as a Rubber Band

eraser icon

For reference, this hardness is as soft as a Pencil Eraser


For reference, this hardness is as soft as a Tire Tread

shopping cart icon

For reference, this hardness is as soft as a Shopping Cart Wheel

hard hat icon

For reference, this hardness is as soft as a Hard Hat

Standard Colors

Natural or peach colors available


  • 2.0″ I.D. / 4.0″ O.D.
  • Thickness or Face: 1/2″

Application Specific Formulations

Benefits of Polyurethane Rings

Cast polyurethane rings maintain their elasticity and strength over the complete range of hardness. They can be stretched and still return to their original dimensions, even at high durometers.

On the other side of elasticity is compression. Urethane is better than rubber when it comes to compression set and has a broader range of durometers (hardness) to fit many applications. At PSI, we have custom formulations in a variety of durometers ranging from “dead” for shock absorbing and “rebound” for repeated flexing. Urethane rings also maintain excellent resistance to chemicals, mineral-based oils, hydrocarbons, fats, greases, petroleum products, and specific solvents.

The technicians at PSI can even formulate urethane to remain flexible in Arctic-like conditions and temperatures as high as 250 degrees Fahrenheit, or to sustain sudden drops in temperature. (Though we don’t recommend continuous use in water hotter than 180 degrees Fahrenheit.)

Common Urethane Ring Applications

  • Capper Rings
  • Packing Rings
  • Tubular Springs
  • Inserts
  • Seals
  • Vibration Isolators
  • Spacers
  • Retainers
  • Bushings

Call PSI for a Custom Quote

Call (800) 888-5156 or request a quote online at any time. You’ll speak with an experienced representative who will get to know your project and ring requirements. We’ll ask about the function of the ring, what it will meet, as well as the ID/OD dimensions and whether you’ll need on or off mandrel tolerances.

Custom Urethane Rings Gallery

Custom polyurethane rings are durable and have the ability to withstand a wide range of applications, reducing equipment downtime and saving on material costs. Learn more about custom urethane rings.

Industries Utilizing Cast Urethane Rings

Many industries rely on urethane rings for their needs, including:

See How We Serve Your Industry
Recommended Reads

Ask Our Experts.

Contact us today to learn how we can meet your project’s requirements.