Delivering Fluid Sealing Solutions Since 1972


ISO3601-5: Suitability of elastomeric materials for industrial applications

ISO3601-5 specifies the appropriateness of various rubber materials which may be used for the production of O Rings intended for use in industrial applications. ISO3601-5 also specifies the capability of the materials to fulfil many of the demands related to fluid power elements and systems. This includes fluid compatibility and temperatures. The manufacturer and customer should both agree on the physical properties.

O Rings synthetic elastomers include:

  • NBR – Nitrile / Acrylonitrile-butadiene – IRHD 70, 90
  • FKM – Fluorocarbon – IRHD 70, 80
  • EPDM – Ethylene propylene diene – IRHD 70, 80
  • VMQ – Silicone – IRHD 70
  • ACM – Polyacrylate – IRHD 70
  • HNBR – Hydrogenated Nitrile – IRHS 70, 80

Depending on installation other materials and hardnesses may be more suited.


Suitability of rubber materials for industrial installations:

Mineral Oil-based fluids:

  • Motor oils
  • Hypoid gear oils
  • Automatic transmission fluid
  • Hydraulic oils (HL, HM) – ISO6743-4
  • Greases


  • Diesel fuel
  • Fuels for petrol engines – normal
  • Fuels for petrol engines – super

Fire-resistant hydraulic fluids:

  • HFA fluids (oil-in-water emulsion) – ISO6743-4
  • HFB fluids (water-in-oil emulsion) – ISO6743-4
  • HFC fluids (water polymer solutions) – ISO6743-4
  • HFDR fluids (phosphate esters) – ISO6743-4
  • HFDS fluids (chlorinated hydrocarbons) – ISO6743-4
  • HFDT fluids (mixtures of HFDR/HFDS) – ISO6743-4

Environmental fluids:

  • HETG (vegetable oils) – ISO6743-4
  • HEES (synthetic ester) – ISO6743-4
  • HEPG (polyglycol) – ISO6743-4

Other service fluids:

  • Water/steam
  • Air
  • Brake fluids

Click here to see the ISO3601 overview (Pt1, Pt2, Pt3, Pt4, Pt5).

If you require additional information about our range and/or services, download our catalogue or contact a member of the team.

E & OE. M Barnwell Services endeavour to make sure that all content is correct. The information has been gathered from manufacturing partners.