Olaplex No.3 Hair Perfector is a weekly at-home treatment, designed to reduce split-ends, strengthen hair strands and ensure shiny and smooth mane. Formulated to realign broken disulfide bonds, compromised by coloring, heat styling and, everyday wear and tear, it restores healthy shine and soft texture. Olaplex No.3 Hair Perfector can be used as a leave-in, overnight treatment or, as a luxe 10-minute pre-wash treatment. pH balance of 3.5-5. Benefits: - Nourishes damaged and compromised hair - Strengthens and protects hair structure - Restores healthy appearance and texture Apply a generous amount from roots to ends on damp, towel dried hair. Comb through once and leave on for a minimum of 10 minutes or more. Rinse from hair, shampoo, and condition. Use once a week or two to three times a week for damaged hair. Pro-Tip: For deeper repair, prime your hair with Olaplex No.0 Intensive Bond Building Hair Treatment. Use No.0 as the first step in a two-part at-home system with No.3 Hair Perfector to strengthen and repair all types of damaged hair. Scientifically Proven: 68% more repair & 3x stronger hair, when used as a two-part system in just one use. Water (Aqua/Eau), Bis-Aminopropyl Diglycol Dimaleate, Propylene Glycol, Cetearyl Alcohol, Behentrimonium Methosulfate, Cetyl Alcohol, Phenoxyethanol, Glycerin, Hydroxyethyl Ethylcellulose, Stearamidopropyl Dimethylamine , Quaternium-91, Sodium Benzoate, Cetrimonium Methosulfate, Cetrimonium Chloride, Fragrance (Parfum), Polyquaternium-37, Tetrasodium EDTA, Butylphenyl Methylpropional, Etidronic Acid, Ascorbic Acid, Phytantriol, Tocopheryl Acetate, Aloe Barbadensis Leaf Juice, Panthenol, Simmondsia Chinensis (Jojoba) Seed Oil, Citric Acid, Potassium Sorbate