You can use this product to 'lock & seal' your makeup: eyeshadow, lipstick, eyeliner and even blush. In order to use this product, you have to squirt a drop of the liquid seal into the pot provided, and then dip your makeup brush or liner into it. It works well turning your eyeshadow into a liner; it stays on for hours! However, once your eyeshadow brush is saturated with the product, it's a bit difficult to get the shadow onto the brush itself. It works well in sealing your eyeliner on your upper lid. Unfortunately, it stings your eyes when applying it on your lower lid and gets into the water rim, leaving you a teary eyed mess!