Occlusive
Occlusive — an ingredient that forms a protective layer on the skin's surface to slow the evaporation of water. By physically sealing in moisture, occlusives help reduce transepidermal water loss and support the skin barrier.
Key points
- Occlusives work by creating a hydrophobic film that limits how quickly water escapes from the skin.
- Common examples include petrolatum, mineral oil, shea butter, beeswax, and various plant-derived waxes.
- They are most effective when applied over damp skin or layered after humectants to trap existing moisture.
- Occlusives are often used in richer creams and balms for very dry, chapped, or barrier-compromised skin.
Frequently asked
What is the difference between an occlusive and a moisturizer?
An occlusive is one type of moisturizing ingredient that seals in water, whereas a moisturizer is a finished product that often blends occlusives, emollients, and humectants. Many moisturizers rely on occlusives to lock in hydration.
Are occlusives good for oily skin?
Occlusives can be used on oily skin, but heavier ones like petrolatum may feel greasy or feel too rich for some people. Lighter formulas or non-comedogenic options are often preferred.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
