While it might be tempting to use your foundation primer as an eyelid primer as well, it’s best to avoid doing so. Use eyeshadow primer instead. Eyeshadow primers are generally thicker and a bit tackier than foundation primers, as they are designed to resist eyeshadow creasing when lids get oily. Foundation primers tend to contain silicone, which is too thin and slick to keep eyeshadow in place for long.