EPDM is a synthetic polymer developed in 1959. Over 50 years EPDM has found an ever increasing use as construction material in the automotive industry and within building and civilengineering. During production the EPDM is vulcanised. The long rubber molecules are joined together by chemical crosslinking, giving an elastic, chemically stable product with negligible ageing despite exposure to UV-radiation, atmosphere, chemicals, water, earth and extremes of temperature.Rubber membranes elongate to a maximum 300 % and can be strained in all directions at the same time (multiaxial response). Rubber membranes are not subject to “stress cracking”, whereas semi crystalline materials will break even at low stress, at points where the surface is scratched, contains defects or exhibit other weaknesses. Strength and elasticity are not affected by high or low temperatures and physical properties are practically unchanged over decades of service, without becoming brittle, cracking or shrinking.Our EPDM membranes have no negative influence on nature. Fish, aquatic or biological life are not harmed. The membrane is chemically stable and does not contain any additives or plasticizers that will be emitted or released during the service life, or when discarded or recycled. EPDM membranes reclaimed from old installations can be burned for energy production, placed on landfills or recycled for use in new EPDM products.