Ingredient dictionary

Cyclomethicone

Also listed as: Cyclopentasiloxane, Cyclic Dimethicone

Cyclomethicone is a light silicone made of ring-shaped molecules, and its main job is to add a smooth, silky feel that evaporates after use. It is on the label of 51 products in our library. Checked against our library November 6, 2026.

The catch: silicones like this one are considered safe, but some people avoid them for curly-hair routines or to cut build-up.

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

What Cyclomethicone does

Gives a light, silky slip
Helps other ingredients spread evenly
Leaves little greasy residue

Cyclomethicone is a silicone. Silicones are built on a backbone of silicon and oxygen atoms, and this version forms small rings instead of long straight chains. It is made through a controlled chemical process that favors the ring shape. Formulators use it as a carrier and spreading agent, which helps other ingredients glide over skin or hair and spread evenly.

Because it evaporates easily after it is applied, it leaves a dry, smooth feel rather than an oily one. That is why it appears in deodorants, moisturizers, makeup removers, and sunscreens. In hair products it can add slip for easier combing. It is generally well tolerated, though like other silicones it can build up over time on hair or skin if not washed out.

Good for

Good for people who want a lightweight, non-greasy feel in everyday products like deodorant, moisturizer, and sunscreen.

Frequently asked questions

Is cyclomethicone safe for skin?

Cyclomethicone is widely used and generally considered safe for most people. Because it evaporates, it feels light. If you know you react to silicones, check the label and ask a dermatologist before use.

Does cyclomethicone cause buildup on hair?

It can, over time. Cyclomethicone evaporates, so it leaves less residue than heavier silicones, but repeated use can still leave a film on hair. Using a clarifying shampoo now and then helps remove it.