POLYSILICONE-4 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYSILICONE-4

Safety grade: A

Polysilicone-4 is a silicone-based polymer that forms a lightweight, invisible coating on hair. It helps smooth the hair surface and reduce frizz without leaving a heavy residue.

This ingredient conditions and smooths hair by coating the hair shaft, reducing frizz, improving shine, and making hair easier to comb.

Graded using: COSING.

Last verified: May 26, 2026