FKM

Black rubber O-Ring on a glass watch glass beside yellow chloranthraquinone powder

Chloranthraquinone O-Ring Compatibility: Which Compounds Hold Up

Chloranthraquinone O-Ring guide for dye intermediate and specialty organic synthesis: chart ratings, why FKM is the preferred start, and which elastomers to avoid.

Black rubber O-Ring on frosted glass beside white crystalline borneol powder

Borneol O-Ring Compatibility: Which Compounds Hold Up

Borneol O-Ring guide for fragrance and specialty organics service: chart ratings, why FKM is the preferred start, and which elastomers to avoid with this terpene alcohol.

Black rubber O-Ring on a frosted glass surface beside an amber bottle of isobutyl chloride

Isobutyl Chloride O-Ring Compatibility: Which Compounds Hold Up

Isobutyl chloride O-Ring guide for chlorinated solvent and alkyl halide service: chart ratings, why FKM is the preferred start, and which elastomers to avoid.

Black rubber O-Ring on frosted glass beside white crystalline dry sulfur trioxide

Sulfur Trioxide Dry O-Ring Compatibility: Which Compounds Hold Up

Dry sulfur trioxide O-Ring guide for sulfuric acid plant and SO3 process service: chart ratings, why FKM is the preferred start, and which elastomers to avoid in dry SO3 duty.

Black rubber O-Ring on frosted glass beside an amber bottle of xylene

Xylene O-Ring Compatibility: Which Compounds Hold Up

Xylene O-Ring guide for petrochemical and solvent service: chart ratings, why FKM is the preferred start, and which elastomers to avoid in aromatic hydrocarbon duty.

Small black round-cord O-Ring on a stainless chemical process valve flange, petrochemical solvent piping softly blurred behind

Benzene O-Ring Compatibility: Which Compounds Hold Up

Benzene O-Ring guide for petrochemical and solvent service: chart ratings, why FKM is the preferred start, and which elastomers to avoid in aromatic hydrocarbon duty.

Small black round-cord O-Ring on a lubricated pump flange, amber lubricating oil and industrial lube skid softly blurred behind

Lubricating Oils (Crude & Refined) O-Ring Compatibility: Which Compounds Hold Up

Lubricating oils (crude and refined) O-Ring guide for pumps, compressors, gearboxes, and lube skids: chart ratings, which elastomers to use, and which to avoid.

Small black round-cord O-Ring on a machined steel lubricant manifold with a thin film of amber synthetic oil, industrial compressor and hydraulic piping softly blurred behind

Lubricating Oils (Synthetic Base) O-Ring Compatibility: Which Compounds Hold Up

Synthetic-base lubricating oil O-Ring guide for compressors, hydraulics, and gearboxes: chart ratings, why FKM is the preferred start, and which elastomers to avoid or test.

Clear glass beaker of naphtha with a black O-Ring falling into the liquid

Naphtha O-Ring Compatibility: Which Compounds Hold Up

Naphtha (petroleum solvent) O-Ring guide: which elastomers swell or fail, why FKM and nitrile usually win, and how to read the chemical compatibility chart for VM&P and solvent naphtha.

Viton® / FKM (Fluoroelastomer) O-Rings

Viton® / FKM O-Ring guide: heat to +400°F, fuel and chemical resistance, the honest low-temperature story, cure systems, fluorine content, durometers, mil-spec, FDA, and every FKM grade we stock.

Viton® Extreme ETP O-Rings

Viton® Extreme ETP O-Ring guide: the specialty FKM that survives bases, amines, ketones, and esters. Temperature range, limitations, grades, and where it beats FKM and undercuts FFKM.