Hexafluoropropylene/Tetrafluoroethylene Copolymer
AKA “FEP, fluorinated ethylene propylene
Synthetic
Ingredient Facts
Hexafluoropropylene/tetrafluoroethylene copolymer
AKA: FEP, Fluorinated ethylene propylene
Synthetic · Emollient · EWG: 4
Synthetic
Emollient
Occlusive
Skin Conditioner
Synthetic
Clean
Hexafluoropropylene/Tetrafluoroethylene Copolymer is a copolymer of hexafluoropropylene and tetrafluoroethylene monomers Science: Functions: Film Forming, Skin Conditioning - Emollient Safety Ratings: CIR: Safe as used
CAS #
-
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.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
Traditional Use
A modern synthetic fluoropolymer developed for specialized cosmetic applications in the late 20th century. It was created to provide water and oil repellency, durability, and enhanced wear properties in formulations.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR