This reinforcer builds in layers to protect the natural nail. A great base for long-lasting manicures, this nail strengthener builds in layers to protect the natural nail and adds strength to brittle or fragile nails. This natural nail strengthener shields the natural nail, acting as a protective barrier between the nail and nail polish to prevent discolouration on natural nails. HOW TO USE Apply one coat of OPI Natural Nail Strengthener in place of your regular base coat nail polish. Or apply daily onto natural nails. Exclusive ProWide brush ensures ease of application. INGREDIENTS Ethyl Acetate, Butyl Acetate, Alcohol Denat. /SD Alcohol 40-B, Nitrocellulose, Isopropyl Alcohol, Tosylamide/Formaldehyde Resin, Triphenyl Phosphate, Trimethyl Pentanyl Diisobutyrate, n-Butyl Alcohol, Camphor, Benzophenone-1, Dimethicone, CI 60725 (Violet 2).