Ingredient Guide
Silica Silylate
Also known as: Silicone-Treated Silica, Hydrophobic Silica, Modified Silica
All skin types
What It Is
A hydrophobically modified silica — silicon dioxide treated with a silylating agent making the surface oil-attracting rather than water-attracting. Used as a texture modifier and thickener, particularly in anhydrous (water-free) or powder-based formulas.
What It Does
Silica silylate creates the powder-to-cream texture of products like The Ordinary Sulfur 10%, helps distribute active ingredients uniformly, and contributes to a soft, powdery skin feel with oil-absorbing properties.
Best For
Texture modificationOil absorption (formulaic)Powder-to-cream format
Benefits
- Creates distinctive powder-to-cream application texture
- Helps distribute concentrated actives uniformly through anhydrous formulas
- Soft-focus mattifying contribution at the skin surface
When to Be Careful
- Primarily functional — minimal direct skin benefit on its own
ItGirlies Ingredient Intelligence
Best Routine Slot
As part of the formula it is in.
Good Match For
Functional ingredient — not a reason to specifically seek or avoid a product.
Proceed Carefully If…
No known concerns.
Signs You May Be Overdoing It
N/A
Commonly Found In
Spot TreatmentsPowder-to-Cream Concentrates
FAQs About Silica Silylate
What is silica silylate in skincare?
A hydrophobically modified silica used as a texture agent and thickener. Responsible for powder-to-cream textures in products like The Ordinary Sulfur 10% Concentrate.