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

Select Durometer

Select Hardness

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

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

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

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

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

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

Standard Colors

Natural or peach colors available

Sizes

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

Application Specific Formulations

FDA Dry and Wet Food Approved 30A to 90A
Static Dissipative material is available in 40A to 85A (other durometers may be available upon request)
Graphite Filled
Dual Durometers

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.

Request A Quote

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.