Xigmatek PTI-G4512 Thermal Conductive Compound Non-Electrical Conductive, Non-Curing & Non-Corrosive High Thermal conductivity: 2.5 W/m.k Not dry out, harden or melt The item is TIM Non-Electrical Conductive, Non-Curing & Non-Corrosive Not dry out, harden or melt The item is TIM