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VINYLDIMETHYL/TRIMETHYLSILOXYSILICATE.

Valuable CAS 68988-89-6 / FILM FORMING

VINYLDIMETHYL/TRIMETHYLSILOXYSILICATE is a silicone polymer that creates a durable, flexible film on skin or hair, crucial for enhancing product longevity and resistance to water and transfer. It is widely used to provide long-lasting wear and a smooth, non-tacky feel in various cosmetic applications.

Summary

Film-forming Makes makeup long-lasting Enhances water resistance of sunscreens Leaves non-tacky film

Science

Mechanism of Action

It acts by forming a continuous, permeable film on the skin or hair, which improves adhesion, elasticity, and bonding. This film-forming property is key for long-lasting, smudge-proof products, enhancing water resistance, and preventing moisture loss.

Research

Clinical Evidence

High confidence
Effective range 1–50%
Optimal

N/A

Key findings

  1. 01 Studies show 1-5% for water and transfer resistance in suncare.
  2. 02 2-10% is effective for film-forming in hair care and 3-10% for deodorants/antiperspirants.
  3. 03 2-4% provides long-lasting benefits and wash-off resistance in skincare.
  4. 04 11-14% offers lasting wear and wash-off resistance in color cosmetics like lipstick and eyeliner.
  5. 05 General use levels up to 50% are noted for excellent transfer and wash-off resistance, flexible film formation, and enhanced SPF wash-off resistance.

Transparency

Dusting Analysis

Not commonly dusted

There is no available data to indicate that VINYLDIMETHYL/TRIMETHYLSILOXYSILICATE is commonly dusted in cosmetic formulations.

The Formula

Formulation

Solubility
Oil
Optimal pH 7 – 7
0 7 14

Stability

Optimal pH is around neutral (about 7).

Conflicts

  • Water
  • Ethanol (95%)
  • Finsolv TN (C12-15 Alkyl Benzoate)
  • Mineral Oil
  • Diisopropyl Adipate
  • Isocetyl Stearate
  • C12-15 Alkyl Lactate
  • Ethylhexyl Palmitate

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The CIR Panel concluded in 2013 that silylates, including related siloxysilicates, are safe as used in cosmetics when formulated not to irritate or sensitize the respiratory tract. While general irritation is uncommon, no specific SCCS opinion for this exact ingredient was found.

Your Skin

Skin Compatibility

Yes Normal
No Dry
Yes Oily
No Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

This ingredient is valuable for its superior film-forming capabilities, making products long-lasting, water-resistant, and transfer-proof across a wide range of cosmetic applications.

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