Living Nails Strengthener can be used as a top coat directly on unpolished nails or as a base coat underneath the top coat or Antifungal Base Coat. Living Nails Nail Strengthener protects your nails from harmful external influences, and helps prevent nail splitting. Always apply onto nails that are clean and free of oil. Surface dries after 3-4 minutes, and completely dries within 10 minutes. BDIH Certified.