1 Average Permeation Rate for ASTM Standard (g x mm) (m2 x days) 2 Mathematically normalized to 1 mm thicknesses using data from tests described in ASTM E96-53T Key: 1 = Excellent 2 = Fair to Good 3 = Poor 4 = Not Recommended
Permeation Rates1 for Selected Elastomers and Nylon 122
Material
Fuel C
90% Fuel C,
85% Fuel C,
Toluene
at 23ºC
10% Ethanol
15% Methanol
at 40ºC
NBR (33% ACN)
669
1028
1188
-
HNBR (44% CAN)
230
553
828
-
Fluorosilicone
455
584
635
-
Nylon 12
5.5
24
83
-
Viton® GLT
2.6
14
60
-
Viton® AL
0.8
6.7
32
-
Viton® A
0.8
7.5
36
49
Viton® GFLT
1.8
6.5
14
-
Viton® B
0.7
4.1
12
-
Viton® GF
0.7
1.1
3
7
Viton® ETP
-
-
-
14
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