construction expansion joint rubber seal strip 1.Material:EPDM foam 2.Hardness:10-25 shore A ... dense parts.(8) Silicone,EPDM molded parts.2.Function:Rubber seal could stop air, water and dust enter the machine ... weather and water resistanced.Anti-aging, anti-radiation, good flexibility, good elasticityUsageSteamboat,yacht, motorboat ,train,subway,car construction expansion joint rubber seal strip ...