EPDM

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.