Dimethicone Silsesquioxane Copolymer
What is Dimethicone Silsesquioxane Copolymer?
Dimethicone Silsesquioxane Copolymer is a hybrid silicone resin formed by copolymerizing dimethicone with silsesquioxane, a cage-like silicone structure, resulting in a film-forming agent with exceptional durability and flexibility. It creates a breathable, water-resistant barrier on the skin that enhances product longevity, provides a smooth sensory feel, and protects against environmental stressors without clogging pores. Commonly used in foundations, primers, sunscreens, and long-wear cosmetics for its sebum-resistant and mattifying properties.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Skin protecting
Forms a barrier to protect skin from external irritants.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Film former
Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.