In February 2026, the differences in performance and application between dimethyl silicone oil and methyl phenyl silicone oil in the silicone oil category have attracted industry attention. The core difference between the two lies in their molecular side groups, which in turn leads to significant differences in performance, application scenarios and cost. Dimethyl silicone oil has methyl as its molecular side group with a regular and single structure, being a colorless and transparent general-purpose silicone oil. It can withstand a high temperature of 150℃ for a long time, with low cost and high cost performance, and is widely used in daily chemical softening, industrial defoaming, general mechanical lubrication and other fields. Methyl phenyl silicone oil replaces part of the methyl groups with phenyl groups and is divided into low, medium and high models according to phenyl content. Its high temperature resistance and radiation resistance are greatly improved, with the high phenyl type able to reach nearly 300℃ for a short time and a higher refractive index. It was also used in the preparation of thermal conductive and wave absorbing gaskets in a new 2026 patent. Although its synthesis process is complex and the price is higher, it has become a key material in high-end fields such as aerospace, nuclear industry and optical instruments, and the low phenyl type is also suitable for ultra-low temperature scenarios such as the polar regions. For more information, please click: https://www.tiktok.com/@mia_iota/video/7597717976720149782