Back to Ingredient Dictionary

CYCLOMETHICONE

Description

Cyclomethicone is a versatile silicone-based ingredient widely used in skincare and haircare formulations. This clear, odorless fluid is composed of cyclic siloxanes, primarily cyclotetrasiloxane (D4) and cyclopentasiloxane (D5). Its low surface tension and lightweight nature make it an excellent choice for various cosmetic applications.

In skincare, cyclomethicone functions as an emollient and carrier, providing a silky, smooth feel without leaving a greasy residue. It enhances product spreadability and creates a temporary barrier on the skin, helping to reduce transepidermal water loss. This ingredient is particularly beneficial in foundations, primers, and moisturizers, where it imparts a matte finish and improves texture.

For haircare, cyclomethicone acts as a conditioning agent, coating the hair shaft to add shine and reduce frizz. It also aids in detangling and improves overall manageability without weighing down the hair. Its quick-evaporating properties make it ideal for leave-in treatments and styling products.

Cyclomethicone is generally considered safe for topical use, though concerns about its environmental impact have led to restrictions in some regions. Formulators should be aware of regulatory guidelines when incorporating this ingredient into their products.