Does Vaseline Clog Pores? What the Science Actually Says
July 1, 2026 · 5 min read
Vaseline has a scary reputation for acne-prone skin — but the science says petrolatum is one of the safest ingredients you can use. Here's the nuance most posts miss.
Vaseline (petrolatum) has a reputation for being pore-clogging and “suffocating” — but that reputation isn't backed by the science. The short answer: no, Vaseline does not clog pores. Here's why, plus the one real catch that trips people up.
Is Vaseline comedogenic?
Petrolatum — the only ingredient in original Vaseline — rates 0 out of 5 on the comedogenic scale. See our full petrolatum comedogenic rating. It's also considered fungal-acne (Malassezia) safe. In other words, it's about as low-risk as a skincare ingredient gets.
Why Vaseline doesn't clog pores
- It rates 0/5 comedogenic — non-comedogenic by definition
- The molecule is too large to penetrate into the pore, so it sits on top of skin
- It's inert and non-reactive — it doesn't irritate or feed acne bacteria
- It's fungal-acne safe, unlike many plant oils
The real catch: what you put UNDER it
Vaseline is an occlusive — it forms a seal over the skin. That seal locks in whatever is underneath it. If you smear Vaseline over an unwashed face or on top of a heavy, comedogenic cream, you can trap oil, sweat and pore-clogging ingredients against your skin. The problem there isn't the Vaseline — it's the layer beneath it.
Slugging with Vaseline: is it safe?
“Slugging” — sealing your routine with a thin layer of petrolatum overnight — is generally safe and effective for most skin types, as long as you apply it over clean skin and a simple, non-comedogenic routine. The main exception is active fungal acne: sealing occlusively over Malassezia-prone skin can make it worse.
When to skip Vaseline on your face
- You have active fungal acne (small, itchy, uniform bumps)
- You'd be layering it over rich, comedogenic products
- You're expecting it to hydrate — it only seals; it doesn't add water. Use a humectant like glycerin or hyaluronic acid underneath
Bottom line: Vaseline itself is one of the safest things you can put on acne-prone skin. Just keep the layer beneath it clean and non-comedogenic — and if you're unsure about a product, check its ingredients first.
Frequently asked questions
Does Vaseline cause acne?
Vaseline (petrolatum) is non-comedogenic (0/5) and doesn't cause acne on its own. Breakouts blamed on Vaseline are usually from trapping a comedogenic product or unwashed skin underneath its occlusive seal.
Is Vaseline non-comedogenic?
Yes. Petrolatum rates 0/5 on the comedogenic scale and is considered fungal-acne safe, making it suitable for acne-prone skin when used over a clean, non-comedogenic base.
Can I use Vaseline for slugging if I'm acne-prone?
Usually yes — apply a thin layer over clean skin and a simple routine. Avoid slugging if you have active fungal acne, since heavy occlusion can worsen Malassezia.
Does Vaseline help acne scars?
Vaseline can support healing by keeping the skin barrier moist, which may help scars fade more smoothly, but it doesn't actively treat or remove scars.
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