New Lash Sensational Primer. Boosts the look of mascara volume and length, leaving lashes soft and supple. Maybelline’s 1st mascara to prime lashes before the use of regular mascara. How to apply: Step 1. Use twice a day, in the morning and at night. Step 2. Apply a layer of the serum to lashes, from root to tip and along the base. Step 3. Allow to dry before applying mascara.