Product Selection Guide
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Elastomeric Properties - General Comparison Chart
  Property     Natural     EPDM    SBR     Neoprene     Nitrile     Silicone     Fluorosilicone     Fluoroelastomer  
ASTM Designation NR EPDM SBR CR NBR VMQ FVMQ FPM
Hardness(A) 30-90 40-80 40-90 40-95 40-95 30-90 40-85 60-90
Tensile (psi) 2500+ 1000+ 1000+ 3000+ 1000- 1200- 1200- 2000+
Specific Gravity
(Base Polymer) 		.95 .90 .95 1.23 1.00 1.10 1.45 1.85
  Max Service Temp.   200F 250F 200F 250F 250F 500F 450F 500F
Rebound Excellent Good Good Very Good Good Excellent Excellent Excellent
Electrical Insulation   Good   Good Good Fair   Poor   Excellent Excellent Excellent
Resistance to:  
Tear   Good   Fair Fair Good Fair Poor Poor Fair
Abrasion   Excellent   Good Excellent Excellent Good Poor Poor Good
Ozone   Fair   Excellent Fair Very Good Fair Excellent Excellent Excellent
Sunlight   Poor   Excellent Poor Very Good Poor Excellent Excellent Very Good
Organic Oils   Poor   Excellent Poor Good Excellent Good Excellent Excellent
Acid   Good   Excellent Good Good Good Good Excellent Excellent
Flame   Poor   Poor Poor Good Poor Fair Fair Good
Heat Good Very Good Very Good Very Good Very Good Excellent Excellent Excellent
Cold   Good   Good Good Good Good Excellent Excellent Good
Oil & Gasoline   Poor   Poor Poor Fair Good Fair Excellent Excellent
Water   Fair   Excellent Excellent Very Good Very Good Excellent Excellent Excellent

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