Sally Hansen Hard As Nails, 13,3 ml, Nail Care for Women, The Sally Hansen Hard As Nails nail polish will give you beautifully styled nails in moments. Characteristics: bright, rich colour ensures a high gloss long-lasting strengthens and firms the nails keeps nails healthy and beautiful How to use: Apply a thin layer of gel polish to the nails - working from the centre to the sides to avoid any excess on the edges. Apply multiple coats for a more intense look. Allow to dry.