Science
Mechanism of Action
This ingredient forms a three-dimensional network within oil-based systems, significantly increasing viscosity and structural integrity. Its hydrophobic nature allows it to effectively thicken oils, suspend solid particles like pigments or active ingredients, and prevent separation, thereby enhancing product stability. On the skin, its highly absorbent properties manage sebum production, yielding a matte, shine-free finish. It also refines product feel, imparting a smooth, silky, non-greasy texture, and can create a protective, vapor-permeable film.
Research
Clinical Evidence
High confidenceOil-gel formation is commonly achieved with 5-10% concentration, while a matte texture is observed in the range of 0.5-4.0%.
Key findings
- 01 Functions as a thickener, oil gelling agent, suspension aid, and stabilizer across a broad concentration range (0.1-30%).
- 02 Effective for creating oil-gels.
- 03 Provides a matte texture to formulations.
Transparency
Dusting Analysis
The research data does not indicate concerns regarding 'dusting' in the context of typical cosmetic application or formulation with Silica Dimethicone Silylate.
The Formula
Formulation
Stability
Exhibits robust stability, resisting syneresis (oil leakage) in balm applications and remaining stable at high temperatures, though some sources recommend avoiding heat above 80°C. Optimal storage involves a closed container in a cool, dark, and dry environment.
Synergies
- Volatile silicones
- Waxes
- Emollients
Conflicts
- Water (not water-compatible, avoid water introduction)
- Overly polar oil blends
- Formulations containing excessive alcohol (builds networks best in non-polar oils, esters, silicones, or solvents like isododecane)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded it is safe for use when formulated to prevent respiratory irritation or sensitization. However, the Scientific Committee on Consumer Safety (SCCS) previously indicated insufficient data to assess the safety of silica dimethyl silylate in nano form, noting that synthetic amorphous silica (including this ingredient) in nanomaterial form is considered insoluble or bio-persistent.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Silica Dimethicone Silylate is a highly valuable ingredient for oil-based formulations, effectively enhancing texture, stability, and providing mattifying benefits with low irritation potential for most skin types.
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