EPDM

EPDM (=ethylene-propylene-diene rubber) is a synthetic rubber that is used as a sealing material in the construction industry. Areas of application here are mainly roof waterproofing membranes, hoses, profile seals in facades or granules as infill in floor coverings. EPDM is elastic, weather-resistant and resistant to heat and ozone. However, EPDM is not resistant to mineral oils, aliphatic and aromatic solvents and nitric acid.

More about EPDM

EPDM is a polymer consisting of various macromolecules:

• Ethylene (also known as ethylene): an unsaturated hydrocarbon from the petroleum industry
• Propylene (also propene): colorless, combustible gas from the petroleum industry
• another diene: organic compound with two carbon-carbon double bonds

The properties of EPDM can be specifically influenced by the ratio of the chemical building blocks, as well as by the selection of the diene. EPDM has a relatively high density of 1.4g/cm³ and has a high elasticity. Furthermore, it has a high resistance to most chemicals as well as a very high temperature resistance. The elastomer is resistant to alcohols, ketones, esters as well as acids and alkalis. However, fats and mineral oils attack the substance, and EPDM is also resistant to weather influences, ozone and UV radiation.

Properties of EPDM:

• variable tensile strength: 3.5 MPa to 12 MPa
• Average elongation at break: up to 550 %
• moderate rebound elasticity: up to 45 %
• variable Shore hardness A: 25° to 80°

Planning notes The

operating temperature range of EPDM extends from -60 to +160°C. It is resistant to hot water and water vapour.

EPDM is available as roofing foil, pond liner and in the form of insulation boards. Water pipes and door seals are also made of ethylene-propylene-diene rubber.

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