Electromagnetic　interference　(EMI)　is　considered　as　a　crucial　environmental　and　reliability　issue　in　electronic　information　industries,　especially　with　the　rapid　development　of　information　technology.　Since　electromagnetic　signals　are　prone　to　be　interfered　by　external　electromagnetic　radiation,　it　is　urgent　to　take　effective　measures　to　reduce,　or　ultimately　eliminate　the　electromagnetic　interference.　Electromagnetic　shielding　conductive　silicone　rubber　hence　attracts　great　attention　based　on　such　demands.　In　this　paper,　we　report　our　fundamental　studies　on　conductive　polymer　composite　materials,　i.e.,　adding　different　conductive　filler　into　polymer　to　achieve　required　conductivity.　Conductive　polymer　composite　materials　have　been　widely　used　in　many　different　areas　owing　to　its　low　cost　and　uncomplicated　processing　techniques.　In　order　to　achieve　better　performance,　the　two　main　components,　silicone　rubber　and　conductive　filler,　should　both　exhibit　good　performance　and　compatibility.　This　paper　is　focused　on　the　room　temperature　vulcanized　(RTV)　silicone　rubber.　The　attempt　to　improve　the　performance　of　silicone　rubber　was　based　on　the　experimental　efforts　on　formula　design　as　well　as　processing　improvement.　The　formula　and　processing　of　RTV　silicone　rubber　with　required　performances　was　investigated　from　a　series　of　comparative　experiments.　85°C-85%　RH　aging,　100°C　aging,　and　salt　spray　testing　(SST)　were　different　ways　we　employed　to　investigate　the　reliability　of　RTV　silicone　rubber　and　conductive　silicone　rubber.　Several　aspects　of　service　performance　were　tested　and　characterized.　©　2011　IEEE.