Formaldehyde-free, it is designed for extremely damaged nails after the removal of artificial nails, gel, gelish, acrylic etc... Herôme Hardener guarantees hard and strong nails in 21 days! 

Application

Day 1: Apply a layer of Nail Hardener
Day 2: Apply a second layer of Nail Hardener
Day 3: Remove the layers with the Herôme Caring Nail Polish Remover and apply a layer of Nail Hardener.
Day 4: Apply a second layer of Nail Hardener, etc.
Repeat this for program for 3 weeks.