Silicone oil is very important for adjusting the skin feel of skincare products because it is very smooth and cannot be replaced by many other oils. Due to this characteristic, silicone oil is widely used in a type of product - the sunscreen that everyone uses in summer.
Everyone understands the characteristics of sunscreen. Due to the use of sunscreen, it is often not particularly enjoyable. In addition, sweating a lot in summer can make it a bit sticky. With silicone oil, many troubles can be solved.
For example, products like polydimethylsiloxane and cyclopentamethylsiloxane that regulate skin sensation can achieve a very smooth application, while the latter has a certain volatility. After use, if there is no substance or residue, they can reduce the stickiness of various sunscreen agents and are almost irreplaceable.
In addition, 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 sticky silicone oil), so sweat on the skin can evaporate freely without producing a stuffy feeling, which is exactly the characteristic required for sunscreen.
If silicone oil free sunscreen products were born one day, besides satisfying the inner sense of superiority in pure beauty, it may not be possible to apply them to the face. A pile of sunscreen can clog you up, and then use them for a day to suppress acne
As an aside, the breathability of silicone oil has even been widely used in the field of clinical medicine.

For example, some wound dressings or gel that assist scar healing are mainly composed of silicone oil and silicone elastomer.
Because they have certain water locking properties and are not as airtight as mineral oil, they allow water vapor to pass through, which is beneficial for wound healing.
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