Polyurethane-23
AKA “Polyurethane-23, PU-23
Synthetic
Ingredient Facts
Polyurethane-23
AKA: PU-23
Synthetic · Film Forming · EWG: 4
Synthetic
Occlusive
Skin Conditioner
Synthetic
Clean
Creates a smooth, flexible protective layer on skin that helps lock in moisture and keeps formulas from breaking down.
CAS #
-
Form
Powder
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Creates Protective Barrier
Traditional Use
Synthetic polymer developed for cosmetic use to provide film-forming and protective properties. Created to improve durability and texture in makeup and personal care 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 a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR
Polyurethane-23 — Duck Heart Ghost