Silica Dimethyl Silylate powder 75g

Silica Dimethyl Silylate is a treated, hydrophobic fumed silica powder used in cosmetics to thicken oils, suspend pigments (prevent settling), control shine, and add a silky texture, forming clear gels in oil phases. It's a lightweight, absorbent powder that provides oil control, improves makeup payoff (like in lipsticks), and adds volume to dry shampoos, acting as a viscosity modifier, emulsifier, and anti-caking agent in various skincare, haircare, and makeup products. 
Key Functions & Benefits
Thickening & Gelling: Creates transparent gels in oils (like mineral, castor, or plant oils) and thickens oil phases in emulsions.
Oil Control: Absorbs oil, making it great for mattifying products.
Pigment Suspension: Prevents makeup pigments from settling in liquid formulas.
Texturizing: Adds a silky, smooth feel and can provide grip in powders like dry shampoo.
Emulsifying: Helps stabilize oil-water mixtures.
Water Resistance: Can increase water resistance in balms and makeup. 
How It's Used
Products: Found in lipsticks, powders, dry shampoos, skincare creams, and sunscreens.
Application: Added to the oil phase of formulations, typically at low usage rates (0.1% to 30%).
Handling: A light powder requiring a dust mask; shear mixing helps form uniform gels. 
Ingredient Profile
Type: Synthetic, treated silica.
Appearance: Ultra-lightweight, fluffy white powder.
Properties: Insoluble in water, odorless, and hydrophobic (oil-loving).



Description

Silica Dimethyl Silylate is a hydrophobic (oil-loving) form of fumed silica that has been surface-treated with dimethyl silyl groups.
Compared to regular silica, it:

Is water-repellent

Has excellent oil-thickening and gelling ability

Improves texture, stability, and suspension

Reduces greasiness and tackiness

It appears as a very light, fine white powder with high surface area.

Common Uses

It is widely used in cosmetic, personal care, and pharmaceutical formulations, especially oil-based systems.

Typical applications include:

Oil and anhydrous gels

Creams and ointments

Sunscreens

Makeup (foundations, primers, lipsticks)

Anti-caking agent in powders

Suspension agent for pigments and actives

Rheology modifier (thickener)

Usage Rate (Typical)

The amount depends on the viscosity and structure you want:

0.2 – 1% → Light thickening, improved stability

1 – 3% → Medium viscosity, suspension support

3 – 7% → Strong oil gel formation (ointments, clear oil gels)

Most cosmetic formulas use 0.5 – 3%

How to Use (In Formulation)

Important: This material is dusty and very light—handle carefully.

For Oil-Based or Anhydrous Systems

Pre-disperse into oils

Slowly add Silica Dimethyl Silylate into the oil phase

Use high shear mixing (homogenizer or fast propeller)

Mix until fully wetted

The oil will gradually thicken

Add remaining ingredients

Pigments, actives, fragrances, etc.

For Emulsions (Creams/Lotions)

Add to the oil phase before emulsification

Disperse thoroughly before combining with the water phase

Key Benefits in Formulas

Thickens oils without waxes

Improves heat and storage stability

Keeps pigments and actives evenly suspended

Gives a silky, non-greasy feel

Helps prevent oil separation