... resistance,low compression deformation,perfect electrical performance.SBR: high tensile strengh,abrasion resistance,heat resistance,ozone resistance ... ,no permeation.and low compressive strain.EPDM: high tensile strengh,good tearing property,abrasion resistance,ageing ... electrical performance,acid resistance,alkali resistance.NR: high tensile strength,good tearing property,abrasion resistance,heat ...