EPDM (Nordel®) | Sealution - Sealing Technology Engineers

What is EPDM (Nordel®)?

At Sealution we use EPDM rubber, also called Nordel®, in various sealing solutions. It is an abbreviation for “Ethylene-Propylene-Thieen-Methylene” and is a group of synthetic rubbers/elastomers. EPDM is obtained by the co-polymerization of ethylene (= ethylene), propylene (= propylene) and a die, which is an unsaturated hydrocarbon with two double bonds. EPDM is therefore a ter-polymer, a polymer obtained from three monomers.

The process of rubber

After polymerisation, a thermoplastic polymer is obtained, and one of the two double bonds of the monomer remains intact. This allows the polymer to be vulcanised, where standard sulphur bridges are formed between the polymer molecules. Mixed with soot and/or other fillers, a synthetic rubber is then obtained. The ratio between the quantities of the various monomers used largely determines the properties of the EPDM polymer.

The benefits of EPDM rubber

EPDM has many attractive properties, such as:

High elasticity up to 400% over a temperature range of -35 °C to +120 °C
Good resistance to hot water, many bases, acids (including fatty acids) and salts and ozone and UV rays.
Excellent resistance to heat, water and steam, alkali, mildly acidic and oxygenated solvents, ozone and sunlight (UV).
Resistant to the effect of brake fluids and other hydraulic fluids based on phosphate esters.
Special EPDM compounds have good resistance to steam.
With EPDM sulphur vulcanisation you get a cheap material for normal use with a maximum temperature of + 100°C (+212°F).
With EPDM peroxide vulcanization it is resistant to hot water and/or low temperature steam, ketones, alcohols, engine coolants, organic and inorganic acids and bases. For system temperatures up to +120⁰C (+ 248⁰F) and maximum temperatures up to + 150 °C (+ 300 °F).

EPDM rubber is not resistant to:

Petrol
Petroleum oil
Fat
Hydrocarbon environments
Oil & vegetable oil products
Hydraulic oil

Tailormade EPDM gaskets, rings or profiles

At Sealution you can order an EPDM ring, profile or plate of a standard size or have it custom produced. This process starts with you and your wishes. We start off on your drawings and we will advise you on the manufacturability and applicability of the resulting products. When we reach an agreement with you, a three-dimensional design will be made. From this, a trial or zero series will then be produced.

The pilot series

The pilot series is vulcanised in a mould or extrusion process, depending on the intended use. After system and/or construction tests have led to a release of the article, serial production is switched on. Are you expecting a large order? Then it is also possible for us to work with a buffer stock of your products.

Choose Sealution

A self-adhesive EPDM in sheet form, sealing rings, or a specific profile: Sealution delivers exactly what you need. Feel free to contact us to discuss your wishes and requirements. Call us on 0031 223 714 100, or send an e-mail to contact@sealution.eu. We will be happy to put in work for you and we look forward to a long term cooperation!