1. In Skin - care Products

Moisturization
Dimethicone forms a continuous, uniform, and breathable protective film on the skin surface. This effectively blocks the evaporation of skin moisture, playing a crucial role in locking in water and maintaining skin hydration. In high - moisture - retaining creams suitable for the dry autumn and winter seasons, it can significantly enhance the product's moisturizing duration and effect, keeping dry skin hydrated.

Skin Softening and Smoothing
It endows skin - care products with a silky touch, reducing the resistance during application. After application, it makes the skin surface soft and smooth. In high - end emulsion products, dimethicone improves the product's texture, enhancing the consumer's usage experience.

Sun Protection Assistance
Dimethicone can enhance the water - resistance of sun - protection products. It enables the sunscreen agents to adhere tightly to the skin, preventing their loss when exposed to water or sweating, thus ensuring a stable and long - lasting sun - protection effect. This is commonly seen in outdoor - specific or water - resistant sunscreen products.

2. In Hair - care Products

Improving Combability

Dimethicone fills the gaps between hair cuticles, making the hair surface smooth and flat. This reduces friction between hairs, preventing tangling and making the hair easier to comb. Shampoos and conditioners containing dimethicone leave the hair feeling soft and smooth after washing.

Increasing Luster
It forms a lustrous film on the hair surface, effectively reflecting light and giving the hair a natural and bright luster. In deep - conditioning products like hair masks, while repairing damaged hair, it also enhances the hair's gloss.

Anti - static Property
When static electricity is generated due to hair friction, dimethicone reduces the surface resistance of the hair. This allows the electric charge to disperse quickly, preventing the hair from repelling and flying due to static electricity, thus maintaining a neat hairstyle.

3. In Cosmetics 

Dispersing Pigments
Dimethicone reduces the surface tension of pigment particles, enabling the pigments to be evenly dispersed in the cosmetic product system. This prevents aggregation and sedimentation, ensuring a uniform color of the product. In the production of powdered cosmetics such as eyeshadows and blushes, it ensures consistent color every time they are used.

Adjusting Texture
It can adjust the consistency and rheological properties of cosmetics, giving the product an appropriate viscosity and 延展性 for easy application. In lip glosses and mascaras, the addition of dimethicone controls the product's thickness, preventing it from being too thin or too thick.

Forming a Water - resistant Film
Dimethicone forms a water - resistant film on the skin or hair surface, improving the water - and sweat - resistance of cosmetics and maintaining the durability of the makeup. This is often added to water - resistant eyeliners, mascaras, and foundations.

4. In Bath Products

When added to shower gels, dimethicone, while cleansing the skin, leaves a small amount of silicone on the skin surface to form a protective film. This prevents the skin from becoming dry and tight due to over - cleaning, leaving the skin feeling soft and moisturized after a bath.