... field, - playgrounds,- school yards, golf fields. . Ethylene Propylene Diene Monomer Rubber,also named as EPDM in short, is the polymer of ... system and testing procedures are enforced in manufacture of EPDM rubber to guarantee the unanimous color, hardness and gravity of all ... batches as well as in granulating process of EPDM rubber to guarantee the unanimous color fastness and grain size. In ...