Beside, due to the unique bond angle and bond length of silicone oil molecules, oxygen and water vapor can pass through it (even relatively thick 350 viscous silicone oil), so the sweat on the skin can evaporate freely without producing a stuffy feeling at all, which is exactly the characteristics that sunscreen needs.
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IOTA 201-2 二甲基硅油 2cst-化妆品硅油生产商 (personalcaresilicone.com)
