Lash Primer Mascara is a cosmetic product designed to be applied to the eyelashes prior to mascara application. Its purpose is to help prepare and enhance the lashes, creating a smoother and fuller appearance. The formula usually contains conditioning ingredients such as vitamins and proteins to help nourish and strengthen the lashes. Lash primer mascara is typically applied in a thin layer and allowed to dry before mascara application. It can also be worn alone for a more natural look.