Butylene/Ethylene Copolymer
AKA “Plastic polymer, Film-forming polymer”
Synthetic
Ingredient Facts
Butylene/ethylene copolymer
AKA: Plastic polymer, Film-forming polymer
Synthetic · Emollient · EWG: 4
Synthetic
Emollient
Occlusive
Skin Conditioner
Synthetic
Clean
Helps create a smooth, lightweight texture that feels comfortable on skin without being heavy or sticky.
CAS #
9019-29-8
Form
Liquid
State
Solid
See origin →
Functions
Viscosity Controlling
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Smoothing
Controls Viscosity
Traditional Use
Developed in the mid-20th century as a synthetic polymer. Used in cosmetics to improve texture, provide film-forming properties, and enhance product spreadability.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: CosIng · EWG · CIR