Common occlusive skincare ingredients in glass dishes

Occlusives in Skincare: What They Do and How to Use Them

Occlusives are the ingredients that sit on top of your skin and form a barrier, so the water already in your skin can’t evaporate. They don’t hydrate on their own. They seal. Petrolatum is the best-known example, but beeswax, shea butter, dimethicone and some plant oils work in the same way, with very different weight and feel.

This guide covers what occlusives are, how they differ from emollients and humectants, which ones suit dry, oily or breakout-prone skin, and what your options are if you want to skip petrolatum.

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TL;DR

  • Occlusives reduce water loss from the skin’s surface. They seal in hydration rather than adding it.
  • Apply them over slightly damp skin, ideally on top of a humectant such as glycerin or hyaluronic acid.
  • Petrolatum is the most effective occlusive. Plant oils, butters and silicones are lighter options that suit different skin types.
  • Occlusives don’t cause acne on their own, but sealing over unwashed skin can trap sweat, oil and bacteria.
  • Heavy occlusives aren’t for everything: skip them under tight-fitting respirators, and keep treated fabrics away from flames.

Table of Contents

What occlusives actually do

Your skin loses water to the air all day. Scientists call this transepidermal water loss, or TEWL. An occlusive creates a hydrophobic (water-repelling) layer that physically prevents water from evaporating, which is why they tend to feel heavy, greasy or even sticky.

The key point is that an occlusive is a type of ingredient, not a type of product. Wirecutter’s explainer lists petroleum jelly, mineral oil, beeswax, shea butter and dimethicone as common examples. A face cream, a balm and a lip product can all contain one.

Because they only seal, an occlusive on very dry, parched skin is like putting a lid on an empty container. There is nothing underneath to keep in. That is why the order and timing of your routine matters as much as the ingredient you pick.

Occlusive vs emollient vs humectant

These three words get mixed up constantly, partly because one ingredient can do more than one job. Here is the functional split, as described by the Center for Research on Ingredient Safety:

Type Job Typical examples Feel
Humectant Attracts water into the skin Glycerin, hyaluronic acid Light, watery, sometimes tacky
Emollient Softens and smooths by filling gaps between skin cells Squalane, many plant oils, fatty alcohols Silky, cushioned
Occlusive Forms a barrier to stop water evaporating Petrolatum, beeswax, dimethicone Heavy, protective

The difference is easy to miss because “emollient” is really an adjective. Humectants and occlusives can be emollient too, meaning they leave skin feeling soft. Shea butter, for example, is both an emollient and an occlusive.

A well-made moisturizer typically blends all three, balancing comfort against barrier protection. If you want to go deeper on the humectant side, we compared glycerin and hyaluronic acid in a separate guide.

How strong are different occlusives?

Not all occlusives seal equally. According to the American Academy of Dermatology, petrolatum is the gold standard: at a concentration of at least 5%, it can reduce TEWL by more than 98%. Other common occlusive agents such as mineral oil, silicones and lanolin typically reduce it by around 20 to 30%.

Reported TEWL reduction by occlusive ingredient

That gap explains why a thin lotion with a little dimethicone feels so different from a thick ointment. It also explains why strongest isn’t always best. A product that blocks nearly all water loss is wonderful for cracked heels and a poor choice for a shiny forehead in July.

How to use an occlusive so it works

  1. Cleanse first. Use a gentle, pH-balanced, non-comedogenic cleanser. Whatever is on your skin when you seal gets sealed in.
  2. Leave skin slightly damp. Moisture you can seal is the whole point. Pat, don’t rub dry.
  3. Add a humectant. A glycerin or hyaluronic acid serum draws water in. The occlusive then locks in the water the humectant has already attracted.
  4. Seal with the lightest occlusive that does the job. A few drops of oil or a thin layer of cream is enough for many people. Save ointments for the driest areas.
  5. Use it at night if it feels heavy. Overnight is when most of us can tolerate a richer finish.

If you’re unsure whether your skin lacks water or lacks oil, our dehydrated vs dry skin test walks through it in four steps. The answer changes how much occlusion you need.

Which occlusive for which skin type

Dermatologists suggest choosing by skin type and conditions. According to the AAD’s guidance on skin care under face masks, acne-prone or oily skin does better with lightweight, non-comedogenic options like dimethicone or squalane, or water-based lotions and creams instead of heavy ointments. By contrast, extremely dry, eczema-prone or post-procedure skin benefits most from the intense protection of petrolatum-based ointments.

Oily and breakout-prone skin

Go light. Squalane and dimethicone give a seal without the slick finish. Oily skin still gets dehydrated, and skipping moisturizer often makes it feel tighter and shinier. Our guide on non-comedogenic skincare for breakouts covers what to look for on a label.

Dry and very dry skin

You can afford a richer seal. Layer a humectant, then a cream, then, on the driest patches, a balm or ointment. Our five-step hydrating routine shows how the layers stack up.

Eczema-prone skin

The habit that matters most is moisturizing on damp skin after every bath. We explain it in our eczema-safe skincare guide. If you have diagnosed eczema, your dermatologist or doctor should decide which emollient or ointment you use, since prescribing guidance varies.

Lips

Lips have no oil glands of their own, so they lose water quickly and are a natural place for an occlusive. A lip oil or a balm works; we explain why in our piece on lip oil benefits and lip anatomy. If you like a firmer finish, natural lip balms based on butters and waxes are the heavier end of the same idea.

Do occlusives cause acne?

The fear is common, but it is mostly misplaced. The AAD notes that claims about petrolatum causing acne often lack supporting evidence, and that petrolatum is non-comedogenic. The confusion arises because the seal can trap existing sweat, sebum and bacteria against the skin if your face isn’t properly cleansed first.

So the practical rule is about hygiene, not avoidance: cleanse with a non-comedogenic cleanser before and after periods of heavy occlusion. If you do break out, switch to a lighter occlusive or a water-based lotion rather than assuming you must give up sealing entirely.

Petrolatum alternatives

Many people want a plant-based or more sustainable option, and the science is more encouraging than you might expect. A study on sustainable alternatives to petrolatum found that vegetable oils such as olive, sunflower and jojoba don’t match petrolatum’s occlusion in the first 15 minutes, yet many perform comparably over six hours. For a daily moisturizer, that is often enough.

Here is how the main alternatives compare in practice:

Alternative Weight Best for Trade-off
Squalane Light Oily, combination, sensitive Gentle seal, not an ointment substitute
Jojoba oil Light to medium Normal to dry, night use Slower to seal in the first minutes
Shea butter Rich Dry skin, body, lips Can feel heavy on the face
Beeswax Rich, firm Balms, lips, dry patches Not vegan
Dimethicone Light, silky Oily or acne-prone skin A silicone, so not plant-derived

Industry is moving too. Chemical makers have developed renewable, waterless-friendly soft-solid emollients positioned as petrolatum alternatives, which suggests more of these will reach shelves.

If you’re choosing between two of the lightest plant options, our squalane vs jojoba comparison sets out when to use each: squalane in the morning, jojoba at night.

Our perspective

We build our range around a simple idea: skincare should be effective without being complicated. For occlusives, that means we rarely tell people to reach for the heaviest thing on the shelf.

Our perspective — overview diagram

Most routines we see fail at the step before the seal. Skin goes on dry, there’s no humectant, and then a thick layer goes on top and gets blamed for feeling greasy. Hydrate first, then seal lightly. Our products are cruelty-free, vegan and gluten-free, and made with clean ingredients and no artificial additives, so the question we ask about any occlusive is the one we ask about everything: does your skin need it, and what is the lightest form that does the job?

For oily or sensitive skin, that is usually a squalane-type finish. For dry winter skin, it may be a richer layer at night only. Start light, and add weight only when your skin tells you it needs it.

— Cyril

Where to find the right layers

A seal works best on top of hydration. Our moisturizers collection is a good place to start if you want a cream that blends humectants, emollients and a light occlusive in one step. If you’re building a full routine, browse the cleansers, toners, serums and sunscreens on our store and layer from the lightest to the richest.

Safety notes for heavy occlusives

A few situations call for caution, and these are worth knowing before you apply a thick balm.

  • Under a respirator. The AAD advises that petrolatum isn’t recommended as a skin sealant under a mask because it can interfere with the mask’s material and seal. Avoid applying heavy occlusives at least an hour before wearing a tight-fitting respirator such as an N95. If you wear one for work, ask your occupational health team what to use.
  • Heat and tight spaces. The same guidance says moisture-trapping occlusives can disrupt the skin’s thermal regulation if overused, especially under a mask or in hot weather.
  • Fire risk. UK prescribing guidance from NHS Kent and Medway states that emollients are a fire hazard whether or not they contain paraffin. Keep treated clothing and bedding away from open flames, gas hobs, candles and cigarettes, and wash bedding and clothes regularly at a high temperature to limit residue build-up.
  • Medication-related dryness. If you take isotretinoin, the AAD lists dryness and chapped lips as common side effects and offers tips for managing them. Follow your prescriber’s advice on what to apply.

FAQ

Is an occlusive the same as a moisturizer?

No. An occlusive is an ingredient type that blocks water loss, while a moisturizer is a finished product that usually combines humectants, emollients and occlusives. Some products, like balms and ointments, are mostly occlusive. Most face creams are a blend.

What is the difference between an occlusive and an emollient?

An occlusive forms a barrier that stops water evaporating. An emollient softens and smooths the skin by filling small gaps between skin cells. Many ingredients, such as shea butter, do both, which is why the words overlap.

What can I use instead of petrolatum?

Squalane, jojoba oil, shea butter, beeswax and dimethicone are the usual choices. Research suggests several plant oils match petrolatum over six hours, though not in the first 15 minutes. Choose a light option for oily skin and a richer butter for dry skin.

Should I apply an occlusive to dry or damp skin?

Slightly damp skin, such as right after cleansing, gives the best result. Layer a humectant like glycerin or hyaluronic acid first, then seal with the occlusive. Sealing completely dry skin gives you little benefit.

Sources

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