Petroleum jelly, or petrolatum, is typically used as a moisturizer in products made to address dryness and irritation. It forms a thick barrier and can help lock moisture into skin, making it a popular remedy for extremely dry skin. However, petrolatum does receive a "Fair" rating on EWG, flagging that it may be associated with potential health concerns depending on usage, which is worth noting if you're looking for a clean moisturizer.