Polyurethane-23
AKA “Polyurethane-23, PU-23
Ingredient
Ingredient Facts
Polyurethane-23
AKA: PU-23
Ingredient · Film Forming · EWG: 4
Synthetic
Occlusive
Not Clean
Polyurethane-23 is a copolymer of adipic acid, 1,4 butanediol, diphenylmethane diisocyanate, and trimethylolpropane
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.
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
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR