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Which Gasket Should I Use?

FKM BioGasket

Also known as FKM, Type 1 Fluroelastomer or Viton™ (DuPont Performance Elastomers L.L.C.). The BioGasket™ provides excellent resistance to petroleum oils, inorganic acids, organic acids, fuel hydrocarbons, animal and vegetable oils, mineral oils and solvents; the ideal gasket for biofuel blends. 

BioGasket™ also has excellent heat resistance, making service temperatures nearing 150°C / 300°F possible. The General Filters BioGasket™ is ETL Listed for all fuel oils and Bio-Diesel oils up to B100.


Also known as Nitrile or Buna-N, is probably the most common gasket material and it is the standard material for petroleum oils. Buna can stand temperatures to 90°C / 200°F . Buna resists aging very well. Not recommended for bio-diesel in concentrations over B5 (20% bio-diesel). Heating oil applications will require gaskets that carry an agency listing: UL, ETL, Intertek, ULC or CUL. All General Filters Buna-N Gaskets carry an ETL agency listing.


Vellumoid is a treated cellulose fiber impregnated with protein glue and glycerin binder. It is used for speciality Chemicals. Temperature up to 120°C / 250°F. Not recommended for petroleum oils.


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