Oregon Esthetician State Board

Occlusive products are designed to form a barrier on the skin's surface, effectively trapping moisture and preventing trans epidermal water loss. This type of product is particularly beneficial in helping to maintain skin hydration by reducing evaporation of water from the skin. Occlusive agents typically have a thicker consistency and can include substances like petrolatum and certain oils, which sit on the skin and provide that protective layer. On the other hand, emollients work by softening and smoothing the skin but do not necessarily prevent water loss. Humectants attract moisture from the environment or deeper skin layers but do not create a barrier, so while they are crucial for hydration, they serve a different purpose than occlusives. Exfoliants are aimed at removing dead skin cells to improve skin texture and promote cellular turnover, which does not relate to the function of reducing water loss. Understanding these distinctions helps clarify the role that each type of product plays in skincare, particularly in moisture retention.