O-ring materials

In short

PLACEHOLDER — two-sentence summary of o-ring materials: what matters most and how to choose.

Guides in this category

Which material do I need?

Material Match

Tell us what you're sealing:

PLACEHOLDER — Pick what you are sealing and we will name the material that suits it, and why.

NBR (Nitrile)

PLACEHOLDER — Excellent with mineral oils, greases and hydraulic fluids.

PLACEHOLDER — The lowest-cost standard material — stocked in every common size.

EPDM

PLACEHOLDER — Excellent with water, coolants and brake fluid.

PLACEHOLDER — Keep it away from mineral oils and fuels — they swell it.

FKM (Viton®)

PLACEHOLDER — Outstanding with diesel, petrol and most fuel additives.

PLACEHOLDER — Handles the temperatures NBR cannot — up to +200°C.

EPDM

PLACEHOLDER — The only common material that tolerates steam and hot water.

PLACEHOLDER — Never specify FKM here — steam attacks it.

Shop by material

Nitrile O Rings

from £0.20 · 850 products

In stock

Shop Nitrile O Rings

EPDM O Rings

from £0.42 · 62 products

In stock

Shop EPDM O Rings

Red Silicone O Rings

from £0.45 · 135 products

In stock

Shop Red Silicone O Rings

Contact us

Here to help

Got a question we haven’t answered yet? Ask our team. We reply within a day, and good questions become new articles for everyone.

Get in touch