Polyurethane-25
AKA “Polyurethane-25, PU-25
Synthetic
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Ingredient Facts
Polyurethane-25
AKA: PU-25
Synthetic · Binding | Hair Waving Or Straightening | Skin Conditioning · EWG: 4
Plant-Derived
Skin Conditioner
Synthetic
Clean
A flexible polymer that helps products hold their shape and condition hair and skin. It works to smooth frizz and support hairstyling while keeping skin soft and hydrated.
CAS #
-
Form
Powder
Plant-Derived
Synthetic. Polyurethane-25 is synthesized from polyols and isocyanates, belonging to the polyurethane polymer chemical family. It is produced through the polymerization reaction of these precursors, followed by ethoxylation with 25 moles of ethylene oxide.
Function
Binding | Hair Waving Or Straightening | Skin Conditioning
Benefits
Locks in moisture
Traditional Use
Modern synthetic polymer used in cosmetics for flexible film-forming and conditioning applications. Designed to enhance product performance and provide improved water resistance.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR
Polyurethane-25 — Duck Heart Ghost