Science
Mechanism of Action
By grafting C26 (cerotyl) hydrocarbon chains onto a dimethylpolysiloxane backbone, this ingredient mimics the protective properties of natural beeswax. It functions as a specialized coupling agent that harmonizes silicone and organic oil phases, forming a flexible, non-occlusive film that prevents moisture loss through the epidermal barrier.
Research
Clinical Evidence
High confidence3%
Key findings
- 01 Manufacturer data (Siltech) indicates that at 1.0-3.0%, the C26 modification provides superior reduction in trans-epidermal water loss (TEWL) compared to standard dimethicone.
- 02 A 2015 CIR Expert Panel evaluation confirmed safe and effective pigment dispersion and film-forming properties at concentrations up to 5%.
Transparency
Dusting Analysis
Because it is often used for functional texture modification or pigment pay-off, it may be included at very low levels (under 1%) for marketing purposes. However, to achieve its primary clinical benefit of barrier reinforcement and TEWL reduction, concentrations should meet or exceed 1%.
The Formula
Formulation
Stability
Highly stable due to robust carbon-silicon bonding; it remains compatible with mineral oils and organic esters where traditional silicones often struggle.
Synergies
- Mineral oils
- Fatty alcohols
- Organic esters
- Inorganic pigments
Conflicts
- Strong oxidizing agents
Safety
Safety Profile
Safety is contingent on high-purity sourcing; cyclic siloxane impurities (D4 and D5) must remain below 100 ppm in the final formulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A high-performance barrier-reinforcing agent that combines the silkiness of silicone with the substantive protection of organic waxes.
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References
Sources