Occlusive
Skincare Library
Occlusive
Definition (cosmetic use): An occlusive is a film-forming ingredient blend that slows water evaporation from the skin’s surface by creating a heavier barrier on top of the stratum corneum. Occlusive films differ from humectants (which attract water) and emollients (which soften feel without necessarily forming a film).
How occlusives work (cosmetic context)
- Film formation: Creates a surface layer that reduces transepidermal water loss (TEWL).
- Heaviness vs. comfort: Strong occlusion can feel waxy or greasy; lighter systems prioritize breathability.
- When used: Helpful in very dry climates, high wind, or on compromised areas that feel tight or rough.
- Trade-offs: Heavier films can trap residue or feel congesting on some skin types; formulation balance matters.
Layering & compatibility
- AM: Hydration (water phase) → treatment serum → light lipid finish → sunscreen. Reserve heavy occlusion for extreme conditions.
- PM: Gentle cleanse → peptide/treatment serums → lipid finish. Apply heavier occlusive films sparingly and only when needed.
- Tip: Pair humectants with light emollients for a breathable, elegant finish when daily heavy occlusion isn’t desired.
Used in OUMERE
- Serum Bioluminelle — dual-phase, non-occlusive finishing serum that seals hydration with a light, comfortable feel.
- Serum Bioluminelle Concentrate — concentrated lipid finish designed for overnight comfort without waxy residue.
- Oil Dissolution Theory — lipid-based cleanse that removes residue so finishes sit cleanly (no trapped film).
OUMERE formulations are intentionally designed to avoid heavy, waxy occlusion in daily use, favoring breathable lipid systems for a refined finish.
See also
Scientific Note: OUMERE definitions are cosmetic-science references for educational context and routine design. They are not medical advice.