Ethylene/Propylene Copolymer

Ethylene/Propylene Copolymer 1
AKA: EPR, Ethylene propylene rubber
Synthetic
Occlusive
Clean
Ethene, polymer with propene
CAS #
9010-79-1
Form
Liquid
State
Solid
Functions
Abrasive
Bulking
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Physical Exfoliant
Adds Body & Volume
Creates Protective Barrier
Antioxidant Protection
Gently polishes surface
Creates protective layer
Adds volume
Traditional Use
A synthetic elastomer created in the mid-20th century. Used in cosmetics as a film-former and texture agent in primers, foundations, and long-wear formulations.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR