Waterproof liquid gold! One swipe and your eyeliner will be ready to stay put for days. Essence Liquid Ink Eyeliner has a high-precision brush applicator that makes applying a precise black line as easy as 1, 2, 3. The waterproof formula is smudge-proof and suitable for hot and humid climates. How to use: Using the brush applicator, gently draw the desired line on your lid. Remove the product with an oil-based eye cleanser.