Science
Mechanism of Action
As a hybrid silicone, Triethoxysilylethyl Dimethicone/Methicone Copolymer functions primarily by creating a protective, water-repellent film on the skin's surface. This physical barrier is instrumental in reducing transepidermal water loss (TEWL), thereby maintaining optimal skin hydration and suppleness. Beyond its occlusive properties, it significantly improves formulation elegance and performance, acting as a skin conditioner, enhancing product spreadability, and facilitating the even dispersion of insoluble powders like mineral UV filters. Its application further refines skin texture, offering a matte appearance and a temporary 'soft-focus' effect on fine lines and wrinkles.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
No data available in the provided research regarding dusting properties or thresholds for this ingredient.
The Formula
Formulation
Stability
This copolymer is highly soluble in oils and other silicone-based systems, enhancing formula stability and durability due to its water-repellent nature.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel, having extensively reviewed this class of Dimethicone and Methicone polymers, affirms their safety for cosmetic use, provided formulations are non-irritating, particularly for ocular areas. This conclusion, updated between 2020 and 2021, considers the ingredient's large molecular weight, which makes significant dermal absorption highly improbable. Related dimethicone/methicone polymers have reported use concentrations up to 85% for direct skin contact and 37.8% for the eye area, with Dimethicone itself being recognized by the US FDA as a safe skin protectant at lower concentrations.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This hybrid silicone is a valuable ingredient for enhancing skin barrier function, improving product aesthetics and wear, and providing a smooth, matte finish across various skin types.
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