The transient plane source (TPS) method was used to measure the thermal conductivity of two hermetic edge-sealing materials by using the Thermal Constants Analyser. Two materials were studied, the Cerasolzer CS186 alloy and the J-B Weld epoxy-steel resin. They were measured, and the TPS technique was validated by obtaining the thermal conductivity values of mild-steel and indium and comparing them to the available literature values. The thermal conductivity was measured ...