It is non-toxic and non-odorous and has many properties such as physiological inertia, good chemical stability and insulation, resistance to weathering, hydrophobicity and very high anti-shear stress, and can be used within -50 — 180 for a long period. It is widely used for insulation, lubrication, anti-shock, anti-dust oil, dielectric liquor, heat carrier, defoamer, release agent, paint and additive in daily chemicals.