... A 3.Good sealing and pr construction expansion joint rubber seal strip1.The material can EPDM,NBR,SILICONE 2.Easy ... dense parts.(8) Silicone,EPDM molded parts.2.Function:Rubber seal could stop air, water and dust enter the machine ... resistant.4.Application:Railcars,automobile,steamboat,industrial electrical equipment,building door& window,construction machinery,construction bridge and tunnel. Etc. ...