Butylene/Ethylene/Propylene Copolymer

AKA: Plastic polymer, Elastomeric copolymer

Synthetic

Occlusive

Clean

OriginDerived from petroleum-based monomers: butylene, ethylene, and propylene hydrocarbons. Synthesized through catalytic polymerization of these three monomers to create a copolymer chain.

Butylene/Ethylene/Propylene Copolymer is a copolymer of butylene, ethylene and propylene monomers

Form

Liquid

State

Solid

Skin Types

●all-skin-types, gentle

Best For

General

Pregnancy & Breastfeeding Safe

Yes

Functions

Film Forming

Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.

Creates Protective Barrier

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory1 listing →

🛡️Safety-assessed2 reviews →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

EWG

CIR

Safe as used

Pregnancy

Yes

Concentration Guide

Leave-on4.5%

Rinse-offNot reported

0%50%100%

CIR reported use · 2013 survey

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR