Chemical Resistance

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.

Black rubber O-Ring on a frost-covered industrial valve connected to an anhydrous ammonia cylinder

Ammonia (Anhydrous) O-Ring Compatibility: Which Compounds Hold Up

Anhydrous ammonia O-Ring guide for refrigeration and process service: chart ratings, why neoprene and EPDM lead, and why FKM is the wrong start for NH3 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.

Small black O-Ring seated on a bolted stainless process flange, chemical plant piping and tanks softly blurred behind

Butyric Anhydride O-Ring Compatibility: Which Compounds Hold Up

Butyric anhydride O-Ring guide for cellulose acetate butyrate, fragrance, pharma, and agrochemical service: chart ratings, which elastomers to use, and which to avoid.

Small black O-Ring seated on a four-bolt chemical dosing pump flange, wastewater treatment sulfide totes and pipe rack softly blurred behind

Calcium Hydrosulfide O-Ring Compatibility: Which Compounds Hold Up

Calcium hydrosulfide O-Ring guide for leather dehairing, wastewater metal precipitation, and pulp service: chart ratings, which elastomers to use, and which to avoid.

Black O-Ring on a wooden table with white crystalline powder, a beaker of pale amber liquid, and a soft-focus industrial plant background

Potassium Stannate O-Ring Compatibility: Which Compounds Hold Up

Potassium stannate O-Ring guide for alkaline tin plating baths: chart ratings, which elastomers to use around plating tanks, and which to avoid.

Black O-Ring on a wooden table with white crystalline powder, a clear beaker of pale amber liquid, and a soft-focus lab background

Para-Aminobenzoic Acid O-Ring Compatibility: Which Compounds Hold Up

Para-aminobenzoic acid (PABA) O-Ring guide for pharmaceutical and dye intermediates: chart ratings, which elastomers to use, and which to avoid.

Small black round-cord O-Ring beside a clear beaker of pale amber PAG lubricant, modern rotary screw compressor softly blurred in the background

Ucon Lubricant 50-HB-260 O-Ring Compatibility: Which Compounds Hold Up

Ucon Lubricant 50-HB-260 O-Ring guide for PAG compressor, hydraulic, and metalworking fluids: chart ratings, which elastomers to use, and which lack data.

Clear beaker of amber calcine process liquor with a small black O-Ring submerged in the liquid, mineral processing plant in the background

Calcine Liquors O-Ring Compatibility: Which Compounds Hold Up

Calcine liquors O-Ring guide for mineral processing and metallurgy: chart ratings, which elastomers hold up in aqueous calcination circuits, and which to avoid.

Clear unmarked beaker of aqueous solution with a small black O-Ring submerged in the liquid, water-treatment plant in the background

Ammonium Sulfite O-Ring Compatibility: Which Compounds Hold Up

Ammonium sulfite O-Ring guide for water treatment, pulp and paper, and photo chemistry: chart ratings, which elastomers to use, and which to avoid.

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.

O-Ring Chemical Compatibility Chart

The best and easiest free O-Ring chemical compatibility chart on the internet. Search 2,000+ fluids against Nitrile, Viton®, EPDM, HNBR, Silicone, FFKM, PTFE, and more. Ratings for generic commercial compounds at room temperature (~70°F) unless noted.

O-Ring Chemical Compatibility

How to pick an O-Ring compound for your fluid: quick media rules, rating symbols, and a full chemical compatibility chart.