Science
Mechanism of Action
This ingredient functions as a surface modifier, creating a durable, water-resistant film on the skin. This film helps minimize transepidermal water loss (TEWL), thereby enhancing skin hydration and reinforcing the skin barrier. It also acts as an anticaking and opacifying agent, improving pigment dispersion, extending makeup wear, controlling oil, and imparting a desirable slip and smoothness to cosmetic formulations.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
As a large macromolecule, Polycaprylylsilsesquioxane is insoluble in water. For optimal dispersion, it is recommended to incorporate it into low molecular weight silicones using a mixer, ideally without heat application.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Polycaprylylsilsesquioxane, along with 17 other polysilsesquioxane ingredients, is safe for use in cosmetics at concentrations and practices described in their assessment. The highest reported maximum concentration for the group was 55.2% for Polymethylsilsesquioxane. The FDA regulates cosmetic product safety, and this ingredient is listed in relevant product categories; no specific SCCS status was found.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polycaprylylsilsesquioxane is a valuable film-forming and texture-enhancing silicone, improving product feel and wear while contributing to skin barrier support.
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References
Sources