POLYSILICONE-21 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYSILICONE-21

Safety grade: A

Polysilicone-21 is a silicone-based ingredient that helps control how thick or thin a product feels. It's used to adjust the texture and consistency of cosmetic formulas so they spread smoothly and feel comfortable on the skin.

This ingredient thickens or thins cosmetic products to achieve the desired consistency and texture, helping them apply evenly and feel pleasant on the skin.

Graded using: COSING.

Last verified: May 26, 2026