The Catrice Stronger Than Ever Nail Hardener 010 is a high-performance formula designed to help reduce brittleness, splitting, and breakage. Enriched with celery seed extract and glycolic acid, it supports nails, making them feel harder and more resistant – as approved by 92% of users after just two weeks of regular usage. Whether used alone as a strengthening treatment or as a base coat under nail polish, this versatile hardener helps improve the condition and look of the nails. Its fast-drying, transparent formula ensures a smooth, shiny finish for effortlessly groomed nails. confirmed by external self-assessment study with 50 women, 2 coats twice a week