Ingredient dictionary

Dimethicone

Also listed as: Polydimethylsiloxane

Dimethicone is a silicone, a light, water-resistant oil that forms a smooth, breathable barrier on skin and hair. It is on the label of 335 products in our library. Checked against our library November 6, 2026.

The catch: dimethicone is a silicone, and some people avoid silicones in curly-hair routines or to cut down on product build-up. Silicones are considered safe and give slip and shine, so this comes down to personal preference.

Silicones. Smoothing film-formers ending in -cone or -siloxane, such as dimethicone.

What Dimethicone does

Forms a breathable protective barrier on skin
Smooths hair and adds slip
Helps skin hold on to moisture

Dimethicone is made by linking silicon and oxygen atoms into long chains. Chain length can be adjusted, so it comes in many thicknesses, from light fluids to thicker versions. Formulators use it for its slip, water resistance, and thin protective film.

On skin, it feels smooth and light, without the greasy finish of many oils. It spreads easily and leaves a soft layer that helps skin hold on to moisture. In hair, it smooths the outer surface, adds shine, and makes strands easier to comb.

Good for

Suits anyone who wants a smooth, silky feel and a light protective layer in moisturizers, sunscreens, and hair care.

Frequently asked questions

Is dimethicone safe for skin?

Dimethicone is widely used in skincare and is generally well tolerated by most people. As with any ingredient, people with very sensitive skin may want to patch test a new product first.

Does dimethicone clog pores?

Dimethicone is generally considered unlikely to clog pores because it is lightweight and breathable. Every person's skin responds differently, though. If you notice breakouts, try a patch test or switch to a lighter formula to see what suits you.