Science
Mechanism of Action
It functions by creating a breathable, hydrophobic film across the stratum corneum, which significantly reduces transepidermal water loss (TEWL). Additionally, it acts as an emulsion stabilizer, increasing formulation viscosity and ensuring a smooth, consistent application by preventing active ingredients from separating.
Research
Clinical Evidence
High confidence10%
Key findings
- 01 A primary irritation study using representative polyenes on 6 New Zealand White rabbits yielded a Primary Irritation Index of 0.38, classifying the ingredient as a non-irritant.
- 02 Human dermal sensitization testing on related 100% hydrogenated polyisobutene confirmed no observed irritation or allergic sensitization across multiple clinical trials.
Transparency
Dusting Analysis
As a functional texture enhancer and occlusive, it is rarely 'dusted' because its physical impact on the formula's viscosity and feel is evident even at lower concentrations. However, levels below 0.5% in an 'occlusive' cream would be insufficient to provide meaningful barrier support.
The Formula
Formulation
Stability
Highly stable and chemically inert; it maintains integrity across a wide pH range and is resistant to degradation. The copolymer variant is water-swellable.
Synergies
- Humectants (Glycerin, Hyaluronic Acid)
- Ceramides
- Lipophilic UV filters
Conflicts
- Strong oxidizing agents
Safety
Safety Profile
The CIR Expert Panel considers the polyene group, including C4-12 Olefin, safe for cosmetic use, even in high-exposure products like lipsticks.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A highly stable and non-sensitizing occlusive that provides essential moisture-locking benefits for dry and sensitive skin profiles.
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