Science
Mechanism of Action
This copolymer functions as a film-former, creating a lightweight, occlusive barrier on the skin that effectively prevents transepidermal water loss, thus supporting increased hydration. As a skin conditioning agent, it refines skin texture by reducing flakiness, restoring suppleness, and temporarily filling in fine lines and wrinkles for an improved, 'plumped' appearance. In cosmetic formulations, it also imparts a silky, smooth feel, enhancing product spreadability.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient is oil-soluble and is optimally incorporated into anhydrous systems or emulsion formulations. It maintains stability across a broad pH range of 2 to 7, with optimal performance often observed within the 3.0 to 6.0 range, particularly in conditioning compositions. Co-formulation with lighter silicones, such as cyclopentasiloxane, can enhance delivery and spreadability.
Synergies
- Lighter silicones (e.g., cyclopentasiloxane)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Dimethiconol/Silsesquioxane Copolymer is safe for use in cosmetics under current practices and concentrations. Its large molecular weight suggests minimal to no significant absorption into the skin. It has not been identified as an eye irritant, dermal irritant, or sensitizer at typical cosmetic concentrations. Residual monomer content is meticulously managed, with a reported maximum of 100 ppm.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Dimethiconol/Silsesquioxane Copolymer is a valuable ingredient for its ability to form a protective barrier, enhance skin hydration, and improve cosmetic texture, making it beneficial across various skin types.
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References
Sources