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Polyurethane Durometer Specifications

Urethane Durometer Specs

The Truth About Durometer

The durometer of urethane, the measurement of its hardness and the range at which it can be produced, is extremely versatile. Did you know that urethane’s durometer can range from as soft as a marshmallow to as hard as a bowling ball?

PSI Urethanes’ custom formulations span three different durometer scales, offering a full range of hardness not available from most urethane suppliers. View our polyurethane durometer specs below.

Polyurethane Properties & Technical Specs

Durometer Scales

  • Shore OO – Used for extremely soft materials
  • Shore A – Used for most rubbers and other elastomers (most common scale)
  • Shore D – Used for harder materials including many rigid plastics

Although a durometer is a general indicator of other physical properties, it by no means reflects the amazing versatility of urethane. Physical properties such as rebound, shock absorption, temperature resistance, chemical/water resistance, flex strength, and stretchability may be more important than hardness.

Let PSI custom formulate your product so it has the right physical properties for the job.

Typical Properties of Compound Formulas – Shore OO

Durometer (ASTM D2240)25-OO40-OO50-OO
Tensile Modulus, PSI (ASTM D412)
Tensile Strength, PSI (ASTM D412)86.5167273
Elongation at Break % (ASTM D412)865763706
Tear Resistance (lb/in.)
Die C (ASTM D624)8.8717.321.4
Compression Set % (ASTM D395B)
Resilience (Rebound %) (ASTM D2632)253039

Typical Properties of Compound Formulas – Shore A

Durometer (ASTM D2240)40A50A60A70A80A90A
Tensile Modulus, PSI (ASTM D412)
Tensile Strength, PSI (ASTM D412)469162064320600045005000
Elongation at Break % (ASTM D412)692573760800585450
Tear Resistance (lb/in.)
Die C (ASTM D624)140159195280345450
Split Tear (ASTM D470)2228427010080
Compression Set % (ASTM D395B)161751403530
Resilience (Rebound %) (ASTM D2632)224402145

Typical Properties of Compound Formulas – Shore D

Durometer (ASTM D2240)50D60D70D
Tensile Modulus, PSI (ASTM D412)
Tensile Strength, PSI (ASTM D412)550063469500
Elongation at Break % (ASTM D412)400329180
Tear Resistance (lb/in.)
Die C (ASTM D624)5507541100
Split Tear (ASTM D470)140110
Trouser (ASTM D1938)314
Compression Set % (ASTM D395B)38411.8
Resilience (Rebound %) (ASTM D2632)404563
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

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