Olaplex LashBond Building Serum - 4.5ml Good For: All skin types and anyone who wants to enhance their natural lashes. Compatible with the use of contacts, lash lifts, lash extensions, and false lashes. Every swipe of this clear, lightweight lash serum delivers highly effective concentrations of NEW OLAPLEX Peptide Complex Technology™, OLAPLEX Bond Building Technology™, hydrating Hyaluronic Acid, and Biotin to the lash line to support and sustain the natural growth cycle and lash retention. Experience more conditioned, healthier-looking lashes In as little as 2 weeks and see the look of longer, fuller lashes in as little as 4 weeks.* Get ready to see your full lash potential. Promotes the look of longer lashes that appear more lifted Promotes the look of thicker lashes that appear denser Promotes the look of healthy, hydrated lashes. Use Dip the brush once and apply to the skin along the upper lash line on both eyes. Do not wash off. Allow to dry for at least 90 seconds before applying other eye products. There's no need to apply to the lower lash line. When to use Use twice daily, AM and PM, on clean, dry skin. Once lashes have reached your desired length, reduce frequency to 2-3 times per week for maintenance.