Exhaust Gases, Containing Sulphur Dioxide Compatibility with O-Ring Materials

Q: Which O-ring material is best for Exhaust Gases, Containing Sulphur Dioxide?

Materials rated Excellent or Good for Exhaust Gases, Containing Sulphur Dioxide include Nitrile (Buna-N), Hydrogenated Nitrile, Fluorocarbon (Viton), Perfluoroelastomer, Ethylene Propylene, Neoprene (Chloroprene), Natural Rubber, Styrene Butadiene, Butyl. Confirm the final choice against your operating temperature and concentration.

Q: Are these Exhaust Gases, Containing Sulphur Dioxide compatibility ratings guaranteed?

No. Ratings are guideline values at ambient temperature (~20°C) and are not a warranty. Compatibility with Exhaust Gases, Containing Sulphur Dioxide varies with temperature, concentration, pressure and exposure time — always validate for your application.

See how Nitrile, Viton (FKM), EPDM, FFKM, silicone and other seal materials rate against Exhaust Gases, Containing Sulphur Dioxide, with an A–D chemical resistance scale.

Back to Chemical Compatibility Checker

Material	Code	Trade Names	Rating
Nitrile (Buna-N)	NBR	Buna-N, Hycar	BGood
Hydrogenated Nitrile	HNBR	Therban, Zetpol	BGood
Fluorocarbon (Viton)	FKM	Viton, Fluorel	AExcellent
Perfluoroelastomer	FFKM	Kalrez, Chemraz	AExcellent
Ethylene Propylene	EPDM	Nordel, Vistalon	AExcellent
Silicone	VMQ	Silastic, Elastosil	XInsufficient Data
Fluorosilicone	FVMQ	Fluorosilicone LS, Silastic FSR	XInsufficient Data
Neoprene (Chloroprene)	CR	Neoprene, Baypren	AExcellent
Natural Rubber	NR	NR, Isoprene (IR)	BGood
Styrene Butadiene	SBR	Buna-S, GR-S	BGood
Butyl	IIR	Butyl, Exxon Butyl	AExcellent
Polyurethane	AU	Adiprene, Vibrathane	XInsufficient Data
Aflas (TFE/P)	FEPM	Aflas, FEPM	XInsufficient Data

AExcellentBGoodCFairDNot RecommendedXInsufficient Data

Guideline only. Values and ratings are representative at ambient conditions and are not a warranty of performance. Actual results vary with temperature, pressure, concentration and exposure time. Validate for your specific application — our engineers can help.

Choosing a seal material for Exhaust Gases, Containing Sulphur Dioxide

The table above rates every common O-ring elastomer for service in Exhaust Gases, Containing Sulphur Dioxide on an A–D scale. A is Excellent, B is Good, C is Fair (test before relying on it), and D is Not Recommended. An X indicates insufficient published data.

For Exhaust Gases, Containing Sulphur Dioxide, the strongest candidates are Nitrile (Buna-N), Hydrogenated Nitrile, Fluorocarbon (Viton), Perfluoroelastomer, Ethylene Propylene, Neoprene (Chloroprene), Natural Rubber, Styrene Butadiene, Butyl. These ratings are representative at ambient conditions (~20°C). Compatibility shifts with temperature, concentration, pressure and exposure time, so always validate the material against your real operating envelope before committing to a design.

Exhaust Gases, Containing Sulphur Dioxide Compatibility with O-Ring Materials

Choosing a seal material for Exhaust Gases, Containing Sulphur Dioxide

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