Quick answer

Stable siloxane polymer; Created through the combination of dimethicone and pyrrolidone carboxylic acid; Helps skin hydration through the reduction of transepidermal water loss; Gives cosmetic formulas an elegant, silky feel Key benefits: Hydration.

PCA Dimethicone

Updated

3-(4-Carboxy-2-oxo-1-pyrrolidinyl)propyl methyl siloxane, polymer with dimethylsiloxane, trimethylsilyl-terminated

Purpose

A siloxane polymer that assists with skin hydration and improves a formula’s skin feel.

Rating

GOOD

Category

Emollient, Polymer, Silicone

INCI Purpose

HAIR CONDITIONING, SKIN CONDITIONING

Benefits

Hydration — Attracts and locks in moisture to keep skin plump and dewy

Risks

Silicone — Creates a barrier on skin that may trap debris and clog pores

Alternative Names

Hair Profile

Functions

Silicone

At a Glance

Stable siloxane polymer

Created through the combination of dimethicone and pyrrolidone carboxylic acid

Helps skin hydration through the reduction of transepidermal water loss

Gives cosmetic formulas an elegant, silky feel

Article

PCA dimethicone is a synthetic emollient skin care ingredient created by combining dimethicone and pyrrolidone carboxylic acid, an amino acid-derived ingredient that’s part of skin’s natural moisturizing factor. It’s used in products for its hydrating benefits as well as its ability to impart a silky, smooth feel when applied to skin.

This siloxane polymer’s an emollient ingredient, meaning that it helps boost skin’s hydration by creating a layer over skin to reduce transepidermal water loss and help ensure a supple feel.

According to suppliers, PCA dimethicone is most commonly used in leave-on moisturizing products, like moisturizers, in concentrations between 0.25%-10.0%. It does not present safety or sensitization concerns for skin.

See: Dimethicone, Carboxylic Acid

References