Easy to use eyeliner … but make it waterproof. Our non-feathering, transfer-proof Eye Tech Extreme Liquid Eyeliner – 01 Blackest Black is a top pick for best waterproof drugstore eyeliner. Just like our other Eye Tech liquid eyeliners, Eye Tech Extreme is fast and easy to apply. This party-proof formulation lasts through sweat, tears, swims and showers. Choose from two incredibly flattering black shades for striking looks and captivating lines. Wings, cat eyes, tightlines and more — you can do it all with Eye Tech, and your look will last and last. Have you had your eye out for the best waterproof eyeliner? Look no further.