Butyl Acrylate/Styrene Copolymer
AKA “Acrylic Copolymer”
Synthetic
Ingredient Facts
Butyl acrylate/styrene copolymer
AKA: Acrylic Copolymer
Synthetic · Emollient · EWG: 1
Synthetic
Emollient
Occlusive
Skin Conditioner
Synthetic
Clean
Creates a flexible, breathable layer on skin that helps products stay put and resist smudging throughout the day.
CAS #
25767-47-9
Form
Liquid
State
Solid
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Viscosity Controlling
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Waterproofing
Anti-Inflammatory
Boosts Collagen
Wound Healing
Creates protective layer
Traditional Use
A synthetic polymer developed in the mid-20th century for cosmetic applications as a film-former and adhesive. Used in products like masques and long-wear formulations.
Skin Types
●all-skin-types, gentle
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe
Pregnancy
Yes
Restricted By
CIR Safety Findings
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Agencies
Verified Feb 2026
Data: CosIng · EWG · CIR