Silicone is beginning to become a repetitive player in both Hair and Makeup industries, used for it's smoothing quality and oil control.
Silicone based primers and liquid foundations are typically used for their long wearing, smoothing, and water repelling qualities. Thus making it a great option for bridal clientele as it aids in filling fine lines and any acne scarring that may be present, as well as preventing oil secretion on days where all eyes are on you.
Recently I've noticed a lot of commentary online citing that they will avoid silicone based products as they have found that they cause breakouts or that it is bad for their skin. However As silicone molecules are too large for the skin to penetrate it, thus cannot cause irritation that will lead to breakouts. As it creates a barrier on top of the skin as it smooths the skin and creates a perfect canvas for makeup application. However if not cleansed properly prior to application it may trap sebum, sweat, dirt and grime that are present in the skin, which can cause breakouts with repeated use.
Due to its nature, it's a good alternative for those who who have sensitive skin, as it doesn't absorb into the skin, and cause breakouts, acne or eczema. It's also preferred for treating areas of the skin for those who have oily or oily combination skin.