Vaseline Original Pure Petroleum Jelly (50ml). Vaseline Petroleum Jelly is the original wonder jelly.. It works by creating a sealing barrier between cells, which locks in moisture and speeds up your skin’s natural recovery from dryness, helping it restore from within. Its occlusive function also allows it to protect dry, cracked skin and minor cuts, scrapes, and burns.. Vaseline petroleum jelly is triple-purified to be 100% pure