Emollient

Stearoxymethicone/Dimethicone Copolymer

INCI: STEAROXYMETHICONE/DIMETHICONE COPOLYMER

Reviewed by Rosie · Last updated 18 Aug 2026

What Is Stearoxymethicone/Dimethicone Copolymer?

Stearoxymethicone/Dimethicone Copolymer (INCI: STEAROXYMETHICONE/DIMETHICONE COPOLYMER) is a cosmetic ingredient listed in the EU CosIng inventory. Silicones and siloxanes, dimethyl, octadecyloxy methyl, trimethylsilyl terminated.

Its declared cosmetic functions are emollient, skin conditioning and viscosity controlling.

Source: European Commission CosIng inventory.

From the Clinic

Not sure what your skin actually needs?

Two minutes, a few questions, and we’ll point you at what matters — no guesswork.

Take the skin quiz

Learn More About Skincare Ingredients

Explore our comprehensive ingredient glossary to understand what's in your products.

Browse All Ingredients

Authorised Stockist

Official UK retailer

Tracked Delivery

Free UK shipping over £50

5 Star Rating

Trusted by thousands

Expert Advice

Free consultations