Petroleum jelly is a mixture of mineral oils and waxes, which form a semisolid jelly-like substance. This will help seal your skin with a water-protective barrier. This helps your skin heal and retain moisture. Effective in keeping skin moist during post-surgery healing. Soak your feet in warm  water with some salt added to it. Towel-dry thoroughly and apply petroleum jelly and clean cotton socks. Apply petroleum jelly along your hairline to prevent hair dye from staining your skin. This also works if you like to paint your nails at home. Petroleum jelly is a mixture of mineral oils and waxes, which form a semisolid jelly-like substance. This will help seal your skin with a water-protective barrier. This helps your skin heal and retain moisture. Effective in keeping skin moist during post-surgery healing. Soak your feet in warm water with some salt added to it. Towel-dry thoroughly and apply petroleum jelly and clean cotton socks. Apply petroleum jelly along your hairline to prevent hair dye from staining your skin. This also works if you like to paint your nails at home.