This strong hardener is a solution for women with soft, brittle or split fingernails who would like to revitalize their nails! For what kind of makeup? A multi-action hardening nail polish: - Protects the nails from outside aggression. - Strengthens, hardens and smooths. - Improves the overall appearance of the nails. Advantages: - The perfect solution for more resistance, stronger and harder nails. - Can be used alone or as a base underneath your favorite nail polish. - Quick drying. How is it used? Apply twice a week on bare and clean nails with the brush, alone or underneath your nail polish.