Occlusive
A product or ingredient that forms a protective layer on the skin's surface to slow moisture loss.
An occlusive is any ingredient or product that creates a physical barrier on the outer layer of your skin. Rather than adding water to the skin, occlusives work by reducing transepidermal water loss — essentially slowing the rate at which moisture evaporates from your skin's surface. Common occlusive ingredients include petrolatum, lanolin, dimethicone, shea butter, and certain plant oils.
In formulations, occlusives are typically the final step in a skincare routine because their job is to seal in everything applied before them. You'll find them in balms, ointments, rich night creams, and lip products. Some occlusives, like petrolatum, are highly effective at reducing water loss (studies suggest by up to 98%), while lighter options like dimethicone offer a less heavy feel and suit a broader range of skin types. Formulators often combine occlusives with humectants (which draw water in) and emollients (which soften) to build a well-rounded moisturiser.
If your skin feels tight or dry despite using hydrating serums, layering an occlusive over the top can help those actives do their job more effectively. They're especially supportive during cooler months, in air-conditioned environments, or when your skin barrier needs a bit of extra protection. Pairing a humectant like hyaluronic acid underneath an occlusive is a classic combination worth trying.
That said, occlusives don't add hydration on their own — they lock in what's already there. Heavier occlusives may not suit everyone; if your skin tends toward oiliness or you're prone to congestion, start with lighter options like dimethicone-based products and see how your skin responds. If you're experiencing persistent dryness or irritation that doesn't improve with consistent care, it's worth speaking to a skincare professional to understand what's going on beneath the surface.
In formulations, occlusives are typically the final step in a skincare routine because their job is to seal in everything applied before them. You'll find them in balms, ointments, rich night creams, and lip products. Some occlusives, like petrolatum, are highly effective at reducing water loss (studies suggest by up to 98%), while lighter options like dimethicone offer a less heavy feel and suit a broader range of skin types. Formulators often combine occlusives with humectants (which draw water in) and emollients (which soften) to build a well-rounded moisturiser.
If your skin feels tight or dry despite using hydrating serums, layering an occlusive over the top can help those actives do their job more effectively. They're especially supportive during cooler months, in air-conditioned environments, or when your skin barrier needs a bit of extra protection. Pairing a humectant like hyaluronic acid underneath an occlusive is a classic combination worth trying.
That said, occlusives don't add hydration on their own — they lock in what's already there. Heavier occlusives may not suit everyone; if your skin tends toward oiliness or you're prone to congestion, start with lighter options like dimethicone-based products and see how your skin responds. If you're experiencing persistent dryness or irritation that doesn't improve with consistent care, it's worth speaking to a skincare professional to understand what's going on beneath the surface.
