POLYURETHANE-24 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYURETHANE-24

Safety grade: A

A synthetic polymer that forms a flexible film on hair strands. It acts like a lightweight coating that helps hair stay in place while maintaining its natural movement and shine.

This ingredient conditions hair by smoothing the hair surface and provides hold and styling support without making hair stiff or flaky.

Graded using: COSING.

Last verified: May 26, 2026