Influence of temperature on dielectric properties of liquid adhesives was researched at 3 different frequencies (100 kHz, 500 kHz in 1 MHz). 2 types of polymerisation and 3 types of polycondensation adhesives were studied. At heating from 20 °C to 90 °C a dielectric properties and loss tangent were measured. Using AGILENT 4285A precission LCR meter dielectric properties were measured also, so as the adhesive temperature with AGILENT 34970A Data acqusition/switch unit. By increasing the heating temperature the dielectric properties increase; they enlarge by increasing the heating temperature, and depend primarly on adhesive type, its structure and viscosity. Catalisator added to the adhesive increases dielectric properties. The loss tangent is the highest when the adhesive is most liquid or when its viscosity is the lowest. By enlarging the electric field frequency the dielectricity of the adhesive reduces.