Specialty Elastomers and Properties
Type	FA	ST	SILICONE	FLUOROCARBON	HYPALON	ACRYLIC
Specific Gravity	1	1.3	1	1.9	1	1
Tensile Strength, psi
Pure Gum .	##	200	0	1800-3000	##	##
Reinforced .	##	###	##	2500-3500	##	##
Practical shore A
Hardness Range	20-80	20-80	20-90	55-80	49-95	40-90
Resilience
Room Temperature	F	F	G	P	G	P
Hot	F-G	F-G	F	F	E	E
Tear Resistance	G	G	F	F-G(gum)	F	F
				G-E(reinf.)
Abrasion Resistance.	F	F	F	G-E	E	G
Atmospheric Aging Resistance	E	E	E	E	E	E
Oxidation Resistance	F	E	E	E	E	E
Heat Resistance	F	F-G	E	E	E	E
Low Temperature Flexibility	G	E	E	F	F	P
Compression Set ..	P	F	E	F-G	F	G
Permeability.	E	E	F	G-E	G	G
Flame Resistance ..	P	P	F	E	G	P
Acid Resistance
Dilute .	G	G	G	E	E	F
Concentrated ..	P	P	P	E	E	P
Moisture Resistance .	F	F	E	E (perox.)	E	F
				F (amine)
Solvent Resistance
Hydrocarbons   ..	E	E	F	E	F	G
Oxygenated Solvents	G	G	G	P*	F	P
				G**
Oil and Gasoline ..	E	E	F	G	F	E
Animal and Vegetable Oils	E	E	G	G	F	E
Dielectric Properties .	G	G	E	G	G	P
E =  EXCELLENT	F = FAIR			* KETONES, ESTERS
G = GOOD	P = POOR			** ALCOHOLS