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Moumoujus

BIS-HEXACOSYL DIMETHICONE.

Valuable / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

An advanced, alkyl-modified silicone polymer that transitions from a waxy solid to a protective, breathable film upon application. It serves as a high-performance occlusive agent that reinforces the skin barrier while providing structural integrity to anhydrous formulations.

Summary

Skin conditioning Emollient Occlusive Viscosity controlling

Science

Mechanism of Action

By integrating long-chain C26 (hexacosyl) groups onto a dimethicone framework, this ingredient increases lipophilicity and skin adhesion. It creates a substantive, non-migrating barrier that prevents moisture loss through occlusion without the heavy or greasy sensation typical of traditional waxes.

Research

Clinical Evidence

High confidence
Effective range 1–5%
Optimal

3%

Key findings

  1. 01 In vivo assessments of alkyl-modified dimethicone polymers show significant reductions in transepidermal water loss (TEWL) and measurable improvements in skin barrier resilience.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

Because it functions as a structural wax and barrier-former, levels below 1% are typically insufficient to provide the necessary film-forming benefits or the desired texture-enhancing properties.

The Formula

Formulation

Solubility
Oil
Optimal pH 3 – 10
0 7 14

Stability

Highly resilient across temperature fluctuations and pH ranges. Requires heating to 50-70°C for proper integration into the oil phase.

Synergies

  • Pigments
  • Mineral UV filters
  • Non-polar oils

Conflicts

  • Highly polar solvents
  • Water-dominant phases without robust emulsification

Safety

Safety Profile

CIR Status
Safe as used
Max tested
15%
Pregnancy
Safe
Sensitization risk Low

The CIR Expert Panel considers substituted dimethicone polymers safe for cosmetic use when formulated to be non-irritating.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

An exceptional barrier-enhancing agent that offers superior moisture retention and formula stability for dry and compromised skin.

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References

Sources