The nail plate is composed of three layers. It is naturally the visible, outer layer that is particularly sensitive to outside elements and can very easily be damaged by too much sun, cold weather, detergents,…. Its specific formula has been developed to give nails resistance. NAIL SHIELD forms a strong physical protection to protect nails from daily tasks and other damaging elements. Then, being protected from breaking, flaking and impacts and with a combined treatment (such as MAVALA SCIENTIFIQUE and/or NAILACTAN), the nail can then correctly regenerate and strengthen itself. How to use: Phase I - Apply a coat over the entire clean nail. Leave on to dry for a few minutes (nylon fibres will then be visible). Phase II - Apply a coat of sealer and leave on to dry completely. If the surface stays rough, apply a second coat. Continue with your manicure by applying a nail polish or a top coat only. Allow to dry thoroughly. Note : This product does not harden nails, it forms only a physical protection.