Here is the polymer selection guide for our different polymer products:

Natural Rubber S.B.R EPDM Polychloroprene (Neoprene) Chlorosulphenated Polyethylene (HYPALON
CSM) 		Nitrile NBR Silicone SI Fluorocarbon (Viton® fluoroelastomers) Fluorosilicone FSI
Properties:
Hardness
Range (Shore A)		 30°-95° 40°-95° 30°-90° 30°-90° 40°-85° 40°-100° 35°-80° 50°-95° 40°-80°
Physical
Strength		 Excellent Good Good Good Good Good Poor Good Poor
Compression
Set		 Good Good Good Fair
to Good		 Fair Good Good Good Good
Tear
& Abrasion Resistance		 Excellent Good Good Good Good Good Good Good Poor
Resilience Excellent Good V.
Good		 V.
Good		 Fair Good Good Fair Fair
Permeability
to Gases		 Poor Fairly
Low		 Fairly
Low		 Low Low Low Fairly
Low		 Very
Low		 Fairly
Low
Electrical
Strength		 Excellent Excellent Excellent Good Good Poor Excellent Good Excellent
Resistance
to:
Flame Poor Poor Poor Self-Extng Good
 Poor Good Self-Extng Self-Extng
Water V.
Good		 Good Excellent Good V.
Good		 Good Good Good Good
Heat ( max°C )
Continuous Intermittent		 75°C 105°C
85°C115°C		 130°C150°C 95°C125°C 130°C160°C 100°C130°C 205°C350°C 205°C300°C 170°C220°C
Low
Temp		 -60°C -55°C -50°C -35°C -25°C -20°C -60°C(-80°C) -20°C -60°C
Oxidation Fair Fair Excellent V.
Good		 Excellent Good Excellent Outstanding Excellent
Ozone Poor Poor Outstanding V.
Good		 Outstanding Fair Outstanding Outstanding Outstanding
Oil
( @ 20°C ) ASTM No.1ASTM No.3		 Poor Unsatisf. Poor Unsatisf.
Fair Unsatisf.		 ExcellentGood
Excellent Excellent
 Excellent Excellent Excellent
Good
Excellent Excellent
Excellent Excellent
Oil
( @ 100°C )ASTM No.1 ASTM No.3		 Unsatisf. Unsatisf. Unsatisf. Unsatisf. Unsatisf. Unsatisf. Good
Fair		 Good
Fair
Good Good 		Good Fair 150°C Excellent
150°C Excellent		 150°C Excellent
150°C Excellent
Fuel
( @ 40°C )ASTM ‘ B ‘		 Unsatisf. Unsatisf. Unsatisf.
Poor
Poor
Fair		 Unsuitable
Excellent
Fair
Solvents (@20°C)Alcohol Acetone
Benzene
Good Fair Unsatisf.
Good Fair Unsatisf.
Good Good Unsatisf.
Good Fair
Unsatisf.
Good
Fair
Unsatisf.
Good Unsatisf. Unsatisf.
Good Fair
Unsatisf.
Good Unsuitable Good
Good Unsuitable Good

Chemicals Acid
Bases
Fair Good
Fair Good
Good Good
Good
Fair
V. Good
Good
Good Fair
Fair Fair
Excellent Good
Good
Fair