What it does
- Seals the skin surface and strongly reduces water loss.
- Protects and supports the repair of very dry, cracked or compromised skin.
- Inert, non-sensitising and highly stable.
How it works
Cosmetic-grade petrolatum is widely documented as the most effective occlusive available, reducing transepidermal water loss by a very large margin. It is inert and non-comedogenic in refined grades, and is a mainstay of barrier-repair and 'slugging' routines. Only refined, cosmetic-grade (USP) petrolatum should be used.
Use level
- Typical use level
- variable; commonly 2–30% (higher in ointments)
Commonly used at 2–30%; higher in ointments and balms. Use refined cosmetic/USP grade.
Formulation considerations
- Oil-soluble semi-solid; melt into the oil phase.
- Extremely stable and inert.
- Occlusive, heavier finish.
What it pairs with & what to avoid
Pairs well with
- Humectants beneath it (to hold water in)
- Barrier lipids
Use with care / avoid
- Unrefined grades (use cosmetic/USP grade only)
Regulatory status
Petrolatum is listed in the EU CosIng database; refined cosmetic-grade material is a long-established, well-tolerated occlusive.
Common questions
Is petrolatum good for skin?
Refined cosmetic-grade petrolatum is a benchmark occlusive that strongly reduces water loss and protects compromised skin.
Is petrolatum comedogenic?
Refined cosmetic-grade petrolatum is considered non-comedogenic and inert.
What is 'slugging'?
Applying an occlusive such as petrolatum as a final step to seal in moisture overnight.