Malu Wilz Nail Hardener Treat & Care The Malu Wilz "NAIL HARDENER TREAT & CARE" strengthens thin and soft nails. The active ingredient combination of calcium, milk proteins and natural oils supports healthy nail growth. - Gives nails protection and more stability. - The nails will have a neat appearance. - As a base coat for colour varnishes, protects against yellowish discolouration of the nails. - Quick drying application shake nail polish bottle briefly. Apply the Malu Wilz "NAIL HARDENER TREAT & CARE" thinly and evenly directly to the natural nail. Apply a second coat if necessary. Use weekly.