The chemical bonds in silicone oil are very flexible, so compared with other oils, it appears extremely smooth (really slippery rather than fake), and because the surface tension is very low, it is easy to spread on the skin, and the stickiness is very low.
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IOTA 201-2 二甲基硅油 2cst-化妆品硅油生产商 (personalcaresilicone.com)