It has excellent heat resistance, oxidation resistance and low temperature resistance, and can be used for a long time in the temperature range of -50 to 220 °C; it has strong shear resistance, and has a high compressibility that is more than 20 times that of general mineral oil. It is an ideal liquid spring; low temperature and viscosity coefficient, low vapor pressure, low surface tension, good water enhancement and lubricity; excellent electrical properties, high breakdown voltage resistance, arc resistance, corona resistance, and low dielectric loss; It also has the advantages of good light transmittance and non-toxic effect on human body.