Treatment aimed at strengthening brittle nails from the first application. As a natural manicure, it provides a high shine while providing hardening properties. It contains hexanal as a hardening agent, a powerful hardener that improves nail health. (Not listed as an allergen) which penetrates the keratin of the nails and reduces their micro lamination. USE: Apply a layer of hardener to clean, unglazed nails. As a natural manicure: apply two coats to a clean, dry nail.