Viton® Permeation Resistance Helps To Reduce Emissions

Viton® Permeation Resistance To Reduce Emissions

Even if high temperatures or aggressive fluids are not involved, Viton® may be specified because it has good resistance to permeation. In automotive, chemical processing, and other industries, Viton® 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	-
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	3.0	7
Viton® ETP	-	-	-	14

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 Viton® That Is Best For You

Viton® is a registered trademark of DuPont Performance Elastomers

Viton® Permeation Resistance To Reduce Emissions