Butene/Propylene Copolymer
AKA “Olefin Copolymer”
Ingredient
Ingredient Facts
Butene/propylene copolymer
AKA: Olefin Copolymer
Ingredient · Film Forming · EWG: 4
Synthetic
Occlusive
Not Clean
Butene/Propylene Copolymer is a copolymer of butene and propylene monomers.
CAS #
29160-13-2
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
Creates Protective Barrier
Controls Viscosity
Creates protective layer
Controls product thickness
Traditional Use
A synthetic polymer developed in the 20th century for use in cosmetic formulations as a film-former and conditioning agent. It has no natural or traditional predecessor.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Verified Jun 2026
Data: CosIng · EWG · CIR