Kiss diamond strengthener is a strengthening basecoat that instantly transforms your nails from weak to thin to ‘diamond-hard’ when continuously using this strengthener. It is enriched with a formula that will make your nails stronger and healthier in days. Get remarkable results with our richly formulated nail hardener and strengthener. tis Vinifera (Grape) Seed Oil, Oryza Sativa (Rice) Bran Oil, Dicaprylyl Carbonate, Tocopheral Acetate. **The Freesia scented cuticle oil also contains Fragrance.