can totally transform a make-up look, but it can also totally ruin one too. We've all been there. What do I mean by that? Well, if applied incorrectly or you choose the wrong formula, eyeliners can smudge, run and smear ruining all of that hard work on the rest of your face.

You don't want to be let down by a terrible liner not doing its job. Which is why the best waterproof eyeliner could be your most-trusted make-up product. We expect a lot from our eyeliners.

We want them to be jet black (or pigmented in whatever shade it promises), give ultra-precision, last all day and not be a total nightmare to remove at the end of the night. So it can take some trial and error to find formulas that do all of that well and are water-resistant. When it comes to choosing a waterproof eyeliner, it really is all in the formula.

Make-up artist explains that the clue is in the name when searching for waterproof liners, look for products that are long-wear as they dry down and set in place. No one is expecting you to swim 100 lengths wearing these formulas (although of course, the very best ones would stay in place for this too), it's more about longevity. For application, Denton notes that making sure the lid is free from any excess oils otherwise it can "break down the formulation of your eyeliner," he says.

"If you’re prone to oily eyelids, try using an , this will not only stop your shadow from creasing but will also increase the longevity of your liner," Denton says. He notes that you .