A cure with Herôme Nail Hardener Strong lasts for 14 days.
Day 1: Apply one layer of hardener.
Day 2: Apply a second layer hardener.
Day 3: Remove both layers with Herôme Nail Polish Remover and add a new layer of hardener.
Day 4: Apply a second layer of hardener
Day 5-14: Keep repeating...
The first few hours after applying the hardener, don't wash your hands with soap as this will have a negative effect on the active substances in the hardener.