The Buxom insidier eyeliners are not waterproof, but they are made for the inner rims of the eyes so they should last a very long time:
If you definitely want a waterproof eyeliner, Make Up For Ever's aqua eyes eyeliners are great quality:
Have I got an eyeliner suggestion for YOU!!! I only recently discovered it myself, but Tarte's Smoldereyes (I personally like the color Fig, a deep plummy/purple...) but it goes sooo smoothly onto the inner rims of the eyes- I never used to line my waterline until I discovered this pencil! You are SURE to love it!!! And it's waterproof as all get out! Make sure you check out the Smoldereyes Pencil, they're kinda chubby and have a sharpener made just for them that comes with! I think they make this in pots too, but I suggest the pencil for inner rims... Have fun!!!
Hi, sweetpea2. In my opinion, the best eyeliners for the waterline are those that are designed specifically for the purpose of lining the inner rim of your eye because they will 1) stay on better and 2) are less likely to cause eye irritation. Some of my favorites are:
1) Buxom Insider Eyeliner which is specifically designed for the inner rim of the eye and comes in a variety of colors which you can find at: http://www.sephora.com/browse/product.jhtml;jsessi
2) Tarte EmphasEYES Inner Rim Brightener which is a very gentle, light-colored eyeliner that makes your eyes appear larger, wide-open and awake. You can find out more about at: http://www.sephora.com/browse/product.jhtml?id=P27
3) Givenchy Magic Kajal Eye Pencil is a very intense carbon black shade designed specifically to apply around the inner rim of your eyes. Inspired by the kajal used by Indian women, the pencil contains wax and oil—making the texture creamy and generous. The formula is enriched with vitamin E for a smooth application and is long-lasting—allowing your dark, eye-catching look to last all day and you can find it here: http://www.sephora.com/browse/product.jhtml;jsessi
Hope this helps!
Have a great day!