Get Longer Eyelashes Naturally| Wash an old mascara or nail polish container and fill with: 1/4 of the container with Castor Oil 1/2 Vitamin E Oil 1/4 Aloe Vera Gel Mix the concoction together as well as you can with your mascara wand, and apply a light layer to lashes (or brows!) every night before bed. Castor oil thickens your lashes while aloe vera gel lengthens. Vitamin E accelerates length. After one month, you’ll notice stronger, longer, more beautiful eyelashes.