... resistance 3.good flexibility, good elasticity 4.Anti- window rubber seal 1.Materials: NBR, NR ,EPDM ,SBR ,SR ,CR ,Silicon, etc. 2.Various sizes ... and other rubber products. The material of these products are NBR, NR, EPDM, FKM, SILICON RUBBER, NYLON, PU, CR, SBR, EP, IIR etc window rubber seal