"Seal the eyeliner deal,'' -NAPOLEON PERDIS. This magical makeup sealer lets you turn your favorite eye shadow into a liner presto! All you need is one or two drops of this clear liquid to define and line eyes. The pay off: water-resistant, smudge-proof and long lasting eyeliner. Pro Tip On the back of your hand mix a little Loose Eye Dust and one to two drops of Cake Eyeliner Sealer. Dip an angled brush into color and apply along your lash line.