SILICONE QUATERNIUM-15 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

SILICONE QUATERNIUM-15

Safety grade: A

This is a silicone-based conditioning agent that's been chemically modified to carry a positive charge. It helps reduce frizz and static electricity in hair while making it smoother and shinier.

It conditions and detangles hair while eliminating static electricity, leaving hair feeling soft and manageable.

Graded using: COSING.

Last verified: May 26, 2026