Mavala Scientifique Nail Hardener is a specialized nail care treatment designed to strengthen and harden weak, soft, or brittle nails. This penetrating solution helps prevent nail splitting and breaking by reinforcing the nail's natural structure. This 5ml nail hardening solution from Mavala Switzerland is formulated to penetrate and strengthen nail plates. For best results, it should be applied 1-2 times per week directly to clean, bare nails. The product works by improving the cohesion between nail layers to create stronger, more resilient nails that are less prone to breaking and splitting.