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Home > FKM Fluorocarbon > Permeation Resistance

FKM Permeation Resistance To Reduce Emissions

Even if high temperatures or aggressive fluids are not involved, FKM fluorocarbon may be specified because it has good resistance to permeation. In automotive, chemical processing, and other industries, FKM helps minimize fugitive emissions to meet Clean Air Act requirements.

Permeation Rates1 for Selected Elastomers and Nylon 122
Material
Fuel C
at 23ºC
90% Fuel C,
10% Ethanol
85% Fuel C,
15% Methanol
Toluene
at 40ºC
NBR (33% ACN)
669
1028
1188
-
HNBR (44% CAN)
230
553
828
-
Fluorosilicone
455
584
635
-
Nylon 12
5.5
24
83
-
FKM fluorocarbon GLT
2.6
14
60
-
FKM fluorocarbon AL
0.8
6.7
32
-
FKM fluorocarbon A
0.8
7.5
36
49
FKM fluorocarbon GFLT
1.8
6.5
14
-
FKM fluorocarbon B
0.7
4.1
12
-
FKM fluorocarbon GF
0.7
1.1
3.0
7

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

Next: Selecting the Type of FKM Fluorocarbon That Is Best For You

 

 

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