Advanced calcium and ceramic gel thickening formula instantly bonds and seals thin, weak nails to build a hard, defensive shield that protects against bending and breaking. The fortifying treatment fills in ridges and imperfections so nails look smooth, healthy and shiny. How to use: Shake gently. Apply one coat to clean, dry, bare nails. For extra thin nails, apply daily for up to 4 days (on top of original coats). Remove using nail polish remover and repeat after 4 days.