Precision Associates, Inc.
Precision Associates, Inc.
3800 North Washington Ave.
Minneapolis, MN 55412-2142
Toll Free: 1-800-394-6590
Local: +1 612-333-7464
Sales: +1 612-334-9190
Fax: 612-342-2417
Email: [email protected]
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Natural Rubber (NR) is harvested as latex from Hevea rubber trees. Polyisoprene (IR) is a synthetic version of Natural Rubber. These polymers are known for having excellent elongation, rebound, and energy absorption properties.

Because it is an organic product, Natural Rubber does have more problems with consistency from lot-to-lot than most man made polymers. Individuals with Latex allergies can respond negatively to Natural Rubber. Both Natural Rubber and Polyisoprene tend to revert when used at elevated temperatures.

The operating temperature range for these polymers is -50º to 180ºF (-45º to 80º C). PAI offers compounds in a hardness range of 30 to 70 durometer. Black is the standard color, but several other colors are available.
Natural Image
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Item #

Nominal Durometer

ASTM Code

Color

Compound Features

RoHS Compliant

REACH Compliant

1302 N/A 30 N/A IR N/A Tan N/A Yes N/A true N/A true
1303 N/A 30 N/A IR N/A Black N/A General Purpose N/A true N/A true
1325 N/A 30 N/A IR N/A Cream N/A Yes N/A true N/A true
1401 N/A 40 N/A IR N/A Tan N/A Yes N/A true N/A true
1402 N/A 40 N/A IR N/A Black N/A General Purpose N/A true N/A true
1423 N/A 40 N/A IR N/A Tan N/A Yes N/A true N/A true
1457 N/A 40 N/A IR N/A Tan N/A Teflon Impregnated N/A true N/A true
1503 N/A 55 N/A IR N/A Black N/A Yes N/A true N/A true
1623 N/A 55 N/A IR N/A Black N/A Floats in Water N/A true N/A true
1620 N/A 60 N/A IR N/A Black N/A General Purpose N/A false N/A false
1720 N/A 70 N/A IR N/A Black N/A Yes N/A false N/A false
1726 N/A 70 N/A IR N/A Black N/A General Purpose N/A true N/A true
1777 N/A 70 N/A IR N/A Tan N/A Tear Resistant N/A true N/A true
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