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Polyurethane Gaskets

Cast Polyurethane Gaskets

The Ideal Choice for High-Stress, High-Load Applications

Many industries make use of gaskets within their engine technology and manufacturing processes, including the food processing, automotive, aerospace, electronics, and military sectors. Though simple in appearance, gaskets play an essential role in an innumerable number of applications.

PSI manufactures gaskets from the highest-quality urethane sheeting. We cut gaskets from precision urethane sheets that are 38.5” x 122.5”, can hold close tolerances of ± .005 on material from .020 to .125 and ± .010 up to .375, and are available in any color and durometer (or hardness). This allows us to meet the customization needs of nearly any gasket application.

Polyurethane Gaskets

Custom cast polyurethane gaskets can be manufactured at PSI without the use of wax or a mold release.

Custom Urethane Gasket Specs

Durometer Hardness

  • 25 Shore OO
  • 40 Shore OO
  • 50 Shore OO
  • 20 Shore A to 90 Shore A
  • 50 Shore D to 70 Shore D
Durometer Reference Calculator
Durometer Chart
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


A full sheet is 38.5” x 122.5”, but you can also select from a half sheet, quarter sheet, or a seamed sheet for larger initiatives.

Thickness Tolerance

Select a thickness tolerance as close as to ±0.001″, with ±0.005″ being standard.

Available Colors

Choose from standard colors of amber or black, or choose from PSI’s selection of custom colors.

Wax Options

Select wax options, or select no wax at all. You can choose from having wax on one or both sides. In the event that your gasket needs to have a Pressure Sensitive Adhesive backing, precision cast sheets can also be manufactured without the use of any wax or mold release.

Benefits of Urethane Gaskets

Urethane is the toughest, most abrasion-resistant of all elastomeric materials. Urethane is a preferred material for gaskets due to its unwavering strength and durability. It can outperform plastic, rubber, and even steel when faced with environmental factors like oil, acid, and many chemicals. A poor quality or ill-fitting gasket, however, could cause chronic leaks or failures, resulting in a catastrophic impact on a product or process.

Polyurethane gaskets are well-known for their ability to conform to the shape of their application, withstand changing weather conditions, and remain flexible in some temperature changes. Urethane will remain flexible down to -90F and can withstand temperatures of up to 250F, though it may soften before that point and lose load-bearing capacity; urethane can withstand intermittently higher temperatures.

Call PSI for a Custom Quote

Call one of our experienced application engineers today at (800) 888-5156 to learn more about urethane gaskets or request a quote for your custom urethane project online at any time.

What Are Urethane Gaskets?

Gaskets create a pressure-tight seal between two or more stationary parts. This seal prevents gas, dirt, dust, or fluid from leaking and is flexible enough to fill any physical irregularities between the surfaces being sealed. Proper cast urethane seals will prevent leakage during temperature and pressure changes, regardless of intensity. Some gaskets can even withstand electrical or electromagnetic forces. They can be designed in the form of a ring or sheet, and can be manufactured in numerous designs and from numerous materials, including metal, rubber, silicone, cork, foam, or a combination of materials. The material and design of the gasket will vary based on the application.

Industries Utilizing Urethane Gaskets

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

See How We Serve Your Industry
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