Seals Eastern, Inc.
Seals, gaskets, and o-rings
Compound 5243 Data Sheet
Description: Low extactable, 70-duro neoprene for refrigerant and general purpose
Physical Properties:
ASTM Method Property Avg. Value Min. Value
D412 Method A Tensile Strength  2603 psi  1947 psi
Ultimate Elongation  312%  194%
Stress at Elongation    
- M25  179 psi   psi
- M50  293 psi  148 psi
- M100  582 psi  203 psi
Strain Energy/ Unit Volume at 20% elongation  20 psi  
Calculated Shear Modulus, G  360 psi  
Calculated Youngs Modulus, E  1081 psi  
E-secant from the initial slope  1017 psi  
D624, Die B Tear Strength  293 psi  
Max Value Min Value
D2240, Type A Durometer Hardness  75 points  65 points
D297, 15 Specific Gravity  1.43  
D395, Test B Compression Set Avg. Value  
22 hrs @ 257F %  
70 hrs @ 257F 31%  
336 hrs @ 257F %  
D865 Dry Heat Aging
Change in Tensile Change in Elongation Change in Durometer
70 hrs @ 257F % %  points
168 hrs @ 257F % %  points
336 hrs @ 257F % %  points
1000 hrs @ 257F  %  %  points
  Temperature Data  
D746 Brittle Point  F
D1329 Temp Retraction TR-10  F
Glass Transition  -40F
Max Operating Temp  F
Rev.  9/15/1997 Shelf Life (years)


LEGAL NOTICE: Seals Eastern makes no representations or warranties, implied or otherwise, on the accuracy or completeness of the data herein.

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Format Rev: 11/17/11