Synthetic Petrolatum

Synthetic petrolatum is a petroleum-derived emollient that mimics the structure of natural petrolatum. It is a semi-solid, colourless ingredient composed of refined mineral oils and waxes. In skincare formulations, it functions as an occlusive agent and viscosity controller, helping to thicken products whilst creating a protective film on the skin surface.Unlike some plant-based alternatives, synthetic petrolatum is highly refined and standardised, making it a stable and predictable ingredient in cosmetic formulations. It does not penetrate the skin but instead sits on the surface, forming …

Synthetic petrolatum works through occlusion rather than hydration. It forms a water-repellent layer on the skin's surface, significantly reducing the amount of water that evaporates from the stratum corneum (the outermost layer of skin). This mechanism is particularly useful for dry or compromised skin barriers that struggle to retain moisture naturally.Because it remains on the surface rather than absorbing into the skin, synthetic petrolatum is effective immediately and works consistently regardless of humidity levels or skin condition.

Synthetic petrolatum is most effective when applied to damp skin, as this traps existing moisture beneath the occlusive layer. It works well in leave-on products such as moisturisers, lip balms, and barrier repair creams. Because of its occlusive nature, it may feel heavy on oily or acne-prone skin, so consider using it selectively on dry or compromised areas rather than across the entire face. It can also be incorporated into cleansing products, where it provides mild cleansing alongside moisturisation.

Synthetic petrolatum is generally well-tolerated and non-irritating, even on sensitive or damaged skin. Those prone to fungal acne may wish to avoid it or patch-test first, as occlusive ingredients can theoretically create an environment favourable to Malassezia growth, though this remains a cautionary note rather than confirmed clinical concern.