Urban Decay 24/7 Glide-On Eye Pencil is considered the best eyeliner for the waterline, according to Into the Gloss. The product goes on smoothly and lasts for hours.
Aqua Eyes by Make Up Forever is also an ideal eyeliner for the waterline. This product works well for people whose eyes water frequently. The formula for the eyeliner is firm, so it stays in place on the eyes, but the pencil's contents can be softened slightly if the eyeliner is held over a lighter until it is warm. Anastasia Beverly Hills Covet waterproof eyeliner is another product that works well for the waterline and is waterproof.