EPDM

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.

Black round-cord EPDM O-Ring on a wooden table with a stainless wall-mounted bottle filling station in the background

EPDM NSF-61 O-Rings: Peroxide-Cured, Chloramine-Resistant Potable Water Seals

Buy EPDM FDA/NSF-61 peroxide-cured O-Rings for chloraminated drinking water, hot water, and food contact. Specs, approvals, and where this 70 duro compound belongs.

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.

EPDM O-Rings

EPDM O-Ring guide: water, steam, brake fluid and weather resistance, -65°F to +300°F range, cure systems, durometers, the oil limitation, and the FDA, NSF-61 and peroxide-cured grades we stock.