Science
Mechanism of Action
As a crosslinked polysilicate, this ingredient functions primarily as a film-former. The Polymethylsilsesquioxane component, characterized by its spherical silicone structure, establishes a thin, protective layer on the epidermis. This layer demonstrably diminishes transepidermal water loss, simultaneously conferring a noticeably smooth and silky skin feel. Beyond hydration support, it acts as a sophisticated soft-focus agent, optically minimizing the visibility of fine lines and pores. Its inherent porous architecture allows for efficient absorption of excess sebum, culminating in a desirable matte complexion. Furthermore, it precisely refines the sensorial attributes, texture, and application ease of skincare formulations.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient's Polymethylsilsesquioxane component reacts with atmospheric moisture and water, releasing methanol; thus, stability is maintained in sealed containers below 30°C. It disperses readily within the oil phase of cosmetic formulations and is compatible with other dry active and texturizing ingredients. Consistent particle size is critical for optimal performance.
Synergies
- other dry active ingredients
- texturizing ingredients
Conflicts
- water
- moisture in the air
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of polysilsesquioxanes, including components related to this crosspolymer, for use in cosmetics at current concentrations and practices. Specifically, Polymethylsilsesquioxane has been utilized at concentrations up to 55.2% in makeup preparations and 20.7% in lipstick formulations. Studies indicate it is non-irritating and non-genotoxic. Its large molecular size renders dermal absorption highly improbable.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This versatile crosspolymer offers significant formulation benefits, delivering a smooth, matte finish with blurring effects while supporting skin barrier function and absorbing excess oil.
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