Dimethicone 5cst , also known as simethicone oil, varies in appearance from colorless and transparent volatile liquid to extremely high-viscosity liquid or silica gel according to the relative molecular weight. It is odorless, has high transparency, and has a heat resistance and cold resistance. Small, waterproof, small surface tension, thermal conductivity, thermal conductivity is 0.134-0.159W/(m K), light transmittance is 100% light transmittance, simethicone is non-toxic and tasteless, physiologically inert, good chemical stability. It has good electrical insulation, weather resistance, hydrophobicity, and high shear resistance, and can be used for a long time at -50°C to 200°C. With excellent physical properties, it can be directly used in moisture-proof insulation, damping, shock absorption, defoaming, lubrication, polishing, etc., and is widely used as insulation lubrication, shockproof, oil and dust prevention, dielectric fluid, and heat carrier. And used as a defoaming, release agent, paint, and daily chemical additive.

Polydimethylsiloxane can be mixed with surfactants such as lanolin, stearyl alcohol, cetyl alcohol, glyceryl monostearate, Tween, and Span as emulsion bases. Adding film-forming agents such as PVP, PVA, and cellulose derivatives to this product can enhance its protective properties. The drug release and skin penetration performance are faster than pod fat, lanolin, and petrolatum.