Phenyl Modified Silicone Fluids has higher coefficient of viscosity-temperature, lower freezing point and higher flash point. The most commonly used high temperature silicone fluids are phenyl silicone fluids. When the phenyl group in the polysiloxane replaces the methyl group, oxidation resistance, thermal stability, and shear resistance are all improved. The phenyl group is usually introduced by a phenylmethylsiloxane or a diphenylsiloxane.