... characteristics1. High-Elastic,high tensile strength, tear strength, non-toxic, non-pollution, harmlessness, used in the waterproof of drinking ... , sewage treatment plant,Classification1. according to shape: ring tape, F, T,U,L E tape2. according to materil: EPDM , neoprene, natural ... , 70% balance should be against BL copy.Technique Data NO.ItemIndexBSJ1Hardness, Shore A60±560±560±52 Tensile Strength ...