POLYURETHANE-14 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYURETHANE-14

Safety grade: A

Polyurethane-14 is a synthetic polymer (chain of molecules) that forms a flexible, protective layer on hair. It's similar to the plastics used in many everyday products, but designed specifically to be safe for use on hair.

This ingredient creates a thin, flexible coating on hair strands that seals in moisture and smoothness while helping hair retain its style and shine.

Graded using: COSING.

Last verified: May 26, 2026