Slugging with Vaseline: what dermatologists actually think

Slugging is the practice of sealing your skincare routine with a thin film of petroleum jelly. The trend exploded on TikTok in 2022, but the technique itself is older: it has roots in K-beauty rituals and in the Black skincare community, where petroleum jelly has long been used to lock in moisture. The science is straightforward. The decision of whether to try it is not.

TL;DR: Slugging seals your routine with a layer of petrolatum (Vaseline, Aquaphor, or a similar ointment) to cut water loss overnight. It works best for dry, mature, dehydrated, or eczema-prone skin. It is risky for oily, acne-prone, or rosacea-flushed faces. Apply on top of clean, hydrated skin only, skip it on active retinoid or acid nights, and use the cheapest jar you can find. The formulation is what matters, not the brand.

Petroleum jelly is one of the most studied occlusives in dermatology. Reviews indexed by the American Academy of Dermatology and clinical work archived on PubMed confirm that petrolatum reduces transepidermal water loss (TEWL) by roughly 99 percent, far more than mineral oil or lanolin. That single number is why slugging works at all, and why it is so easy to get wrong.

What is slugging? The science behind the viral trend

Slugging gets its name from the shiny, slug-like sheen left on the face after a layer of petroleum jelly is applied. As a TikTok trend it was popularised around 2021 to 2022, often credited to creator @charotaray. As a technique it is much older, with documented use in K-beauty layering and in West African and African American skincare traditions for generations.

The core idea is occlusion. After your serums and moisturiser, you add a thin film of a petrolatum-based ointment that physically blocks evaporation. Water that would otherwise leave through your stratum corneum stays in. Active ingredients applied beneath the occlusive can also penetrate slightly more efficiently, which is both the benefit and the danger.

What slugging is not: it is not a moisturiser, a treatment, or a substitute for a barrier repair cream. It is an occlusive layer, the last step on top of an already complete routine.

How slugging works: a deep dive into occlusion and TEWL

The stratum corneum, the outermost layer of your skin, loses water constantly through a process called transepidermal water loss. In healthy skin, TEWL is balanced by the lipid mortar between corneocytes, mostly ceramides, cholesterol, and free fatty acids. When that mortar is depleted by harsh cleansers, cold air, over-exfoliation, or genetics, water leaves faster than it can be replaced. The barrier dries out, cracks, and inflames.

Occlusives are ingredients that sit on top of the skin and physically slow that evaporation. Petrolatum is the gold standard. Comparative studies, including the classic Ghadially review published in the Journal of Investigative Dermatology, show petrolatum reduces TEWL by up to 99 percent, compared with around 20 to 30 percent for mineral oil and lanolin, and far less for plant butters. It is also chemically inert, non-irritating, and one of the few ingredients with an exemplary safety record in dermatology, recognised by the European Academy of Dermatology and Venereology.

This near-total seal is the reason slugging accelerates barrier recovery in compromised skin. It is also the reason it can trap sebum, sweat, and bacteria on acne-prone skin, leading to congestion and inflammatory flare-ups.

The best products for slugging: an independent formulation analysis

The active ingredient in every effective slugging product is petrolatum, sometimes labelled white petroleum jelly or petroleum jelly USP. Independent formulation grading on SkinScore tracks a small list of products that meet the purity and tolerance criteria.

Vaseline Original Petroleum Jelly is 100 percent white petrolatum. It is the cheapest, most studied, and most universally tolerated option. Triple-purified to remove polycyclic aromatic hydrocarbons. No fragrance, no preservatives.
Aquaphor Healing Ointment combines 41 percent petrolatum with mineral oil, ceresin, lanolin alcohol, panthenol, glycerin, and bisabolol. The added humectants and panthenol make it slightly more nourishing, but the lanolin is a known allergen for a small subset of users.
CeraVe Healing Ointment uses 46.5 percent petrolatum with ceramides, hyaluronic acid, and dimethicone. It is the better choice if you want occlusion plus active barrier-repair lipids. Reviewed in our CeraVe versus Cetaphil comparison.
La Roche-Posay Cicaplast Baume B5+ is not a pure occlusive but a centella plus panthenol balm with a film-forming finish. The dermo-cosmetic brand is formulated under standards recognised by the French Haute Autorite de Sante (HAS) and is a smart compromise for sensitive or post-procedure skin.
Avene Cicalfate+ Restorative Protective Cream offers a lighter occlusive feel with copper and zinc sulfates for irritated zones.

For pure slugging, a plain jar of Vaseline does the same job as the boutique tubs, at one-tenth the price. The formulation premium is paid for added humectants, ceramides, or sensorial finish, not for stronger occlusion.

Slugging for your skin type: dry, oily, combination, and acne-prone

Slugging is not a universal practice. Match the technique to your skin.

Dry and dehydrated skin

This is the ideal candidate. Compromised stratum corneum, low TEWL tolerance, winter dryness, eczema-prone tendencies all respond well to nightly or several-times-weekly slugging. Pair with a humectant-rich moisturiser underneath, ideally one containing glycerin, hyaluronic acid, or panthenol. For full hydration logic, see our hyaluronic acid guide.

Mature skin

Mature skin tends to produce less sebum and lose barrier lipids faster, especially post-menopause. Slugging two to four nights per week supports overnight repair without weighing the skin down.

Combination skin

Slug only on the dry zones (often cheeks and around the eyes) and avoid the T-zone. Some users prefer a thinner balm like Cicaplast on combination skin to avoid congestion across the nose and forehead.

Oily and acne-prone skin

This is where slugging gets controversial. Petrolatum itself is non-comedogenic in isolation, confirmed by British Journal of Dermatology and Inserm reviews. The problem is what it traps underneath. If sebum, dead cells, or comedogenic ingredients are sealed against the skin overnight, acne can worsen. If you have active inflammatory acne, fungal acne, or rosacea, skip slugging or limit it to dry patches only.

Sensitive and reactive skin

Plain petrolatum is one of the lowest-risk ingredients available, listed by Inserm dermatology reviews as well tolerated even on broken skin. Avoid versions with added fragrance, lanolin, or essential oils.

How to slug: a step-by-step guide for maximum benefits

Follow this protocol for the evening only. Slugging in the morning blocks sunscreen application and traps daytime pollutants.

Cleanse with a gentle, low-pH cleanser around pH 5.5. A double cleanse is fine if you wore SPF or makeup, but rinse thoroughly.
Tone or essence (optional) to add humectants and prep the skin for absorption.
Hydrating serum with humectants such as hyaluronic acid, glycerin, or panthenol on damp skin.
Moisturiser with ceramides, cholesterol, and free fatty acids. This is the layer that delivers the water you are about to seal in.
Petroleum jelly layer, pea-sized for the whole face, warmed between fingers and pressed gently. Avoid massaging in; you want a thin, even film, not a deep rub.
Sleep on a clean pillowcase that you do not mind staining. Slugged faces transfer to fabric.

If you have very dry hands or lips, you can add an extra dab in those zones. For the order of operations across morning and night, see our skincare routine order guide.

Frequency: start with two nights per week. Increase if your skin tolerates it. Most dry-skinned users settle at three to five nights weekly in winter and one to two in summer.

Slugging with actives (retinol, acids): the do's and don'ts

This is the most common slugging mistake. Sealing actives under petrolatum increases their penetration and their irritation potential, sometimes dramatically.

Do not slug on the same night as a fresh retinoid application. Tretinoin, retinal, or strong retinol formulas combined with petrolatum occlusion can cause aggressive peeling and stinging. If you want both benefits, apply the retinoid, wait 20 minutes, and only slug after full absorption. Beginners should not combine them at all. Our retinol beginner guide covers the ramp-up protocol.
Do not slug on AHA or BHA exfoliation nights. The trapped acids can chemically burn under occlusion.
Do not slug over benzoyl peroxide. The combination irritates and can stain fabric.
Do slug on hydration-only or recovery nights. This is where slugging pairs well with a rotational routine like skin cycling, where nights three and four are dedicated to recovery.
Do apply niacinamide, panthenol, or ceramides freely beneath the occlusive. These are barrier-supporting and well tolerated under petrolatum.

When in doubt, save slugging for the nights when you are doing nothing else.

Beyond petroleum jelly: the best slugging alternatives

For users who dislike the texture or feel of petrolatum, several alternatives offer partial occlusion with a lighter finish. None match the 99 percent TEWL reduction of pure petrolatum, but they get close enough for many skin types.

Squalane is a plant-derived emollient that provides moderate occlusion with a non-greasy finish. Excellent for combination skin.
Shea butter delivers around 30 to 40 percent TEWL reduction with added fatty acids. Comedogenic for some users.
Beeswax-based balms sit between squalane and petrolatum. The Egyptian Magic and Lanolips ranges are popular options.
Dimethicone-rich balms such as silicone primers create a breathable film, though the seal is much weaker than petrolatum.
Hydrocolloid sheet masks offer overnight occlusion on targeted zones without the residue.

For K-beauty-inspired versions of the same idea, see our K-beauty routine guide.

Slugging beyond the face: tips for lips, hands, and body

The face is not the only place slugging makes sense.

Lips: petroleum jelly is the most cited overnight lip balm in dermatology consultations. Apply a thick layer before bed. For chronic chapping, the ANSM lists petrolatum as a recommended option even during pregnancy.
Hands: post-handwash slugging with cotton gloves overnight rebuilds the barrier in two to three nights. Effective during cold weather or after disinfectant exposure.
Heels and elbows: petrolatum after exfoliation, sealed with socks or long sleeves, repairs cracking faster than any cream alone.
Eyelids: a tiny amount on the under-eye area can soften fine lines overnight by retaining hydration. Avoid the upper lid line to prevent migration into the eyes.
Babies and children: petrolatum is widely recommended by paediatric dermatology for nappy rash and eczema barrier support.

Frequently asked questions

Is slugging good for your skin?

For dry, dehydrated, mature, or eczema-prone skin, yes. It reduces overnight water loss by up to 99 percent and accelerates barrier recovery. For oily or acne-prone skin it is risky and can worsen breakouts. The benefit depends on the skin type, not the trend.

Will Vaseline clog my pores?

Pure petrolatum is non-comedogenic and rated zero on the comedogenicity scale. However, it can trap sebum, dead skin cells, and any comedogenic ingredients applied underneath. If you have acne-prone skin, the issue is what is sealed against your skin, not the petrolatum itself.

Can I slug every night?

You can if your skin tolerates it. Most dry-skinned users settle at three to five nights weekly. Daily slugging is fine in winter or for severely compromised barriers. Skip on retinoid, AHA, BHA, and benzoyl peroxide nights.

What is the difference between Vaseline and Aquaphor for slugging?

Vaseline is 100 percent petrolatum, plain and inert. Aquaphor adds humectants, panthenol, and lanolin for extra barrier support. Aquaphor is slightly more nourishing; Vaseline is cheaper and avoids the lanolin allergen risk. Both work as occlusives.

Can I slug with retinol?

Not on the same night for beginners. The occlusion increases retinoid penetration and can cause significant irritation. Advanced users may apply retinol, wait 20 to 30 minutes for full absorption, then slug. Always start without combining them.

Does slugging cause acne?

It can in people who are already acne-prone. Petrolatum itself does not cause acne, but the occlusion can trap sebum and bacteria. If you have active acne, fungal acne, or rosacea, skip slugging on inflamed zones.

Sources

Ghadially, R. et al. (1992). "The aged epidermal permeability barrier. Structural, functional, and lipid biochemical abnormalities in humans and a senescent murine model." Journal of Investigative Dermatology. PubMed
Czarnowicki, T. et al. (2016). "Petrolatum: Barrier repair and antimicrobial responses underlying this 'inert' moisturizer." Journal of Allergy and Clinical Immunology. PubMed
American Academy of Dermatology. "How to care for dry skin." AAD
ANSM. "Recommandations sur les produits cosmetiques et la grossesse." ANSM
Haute Autorite de Sante. "Bon usage des emollients et soins barriere." HAS
Inserm. "Dossier d'information: barriere cutanee et dermatologie." Inserm
European Academy of Dermatology and Venereology. "Guidelines on barrier function and emollient therapy." EADV

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