THE EXTREME NAIL HARDENER by ESSENCE.
THE EXTREME NAIL HARDENER can be used as a base coat or as a clear nail polish and has an ultra-glossy finish.
The formula results in noticeably stronger and harder nails*: The polish can be applied twice a week as a treatment for soft nails that are prone to chipping.
In an external study, 90% of testers confirmed that their nails became harder after two weeks of use.