Silicone Oil in Cosmetics and Skin Care Products: Basic Cosmetics: Silicone oil can improve the texture and application performance of products such as foundation, eyeshadow, and blush, making the makeup look more natural and long-lasting. Skin Care Products: In skin care products like hand creams, silicone oil can form a protective film to lock in moisture and relieve dry skin. Hair Care Products: Silicone oil can fill the gaps in the hair cuticles, making the hair smoother and repairing damaged hair quality.