What it Does A weekly at-home treatment, not a conditioner, that reduces breakage and visibly strengthens hair, improving its look and feel. Clients can benefit from this global bestseller whether or not they receive chemical services. Pro Tip: Prime your hair for deeper repair with our professional-inspired No.0 Intensive Bond Building Hair Treatment (sold separately). 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. PH Balance: 3.5-5 How to Use 1. Apply a generous amount from roots to ends on damp, towel dried hair. 2. Comb through once and leave on for a minimum of 10 minutes or more. 3. Rinse from hair, shampoo, and condition. Ingredients: 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), Tetrasodium EDTA ,Polyquaternium-37, Benzyl Benzoate, Etidronic Acid, Ascorbic Acid, Phytantriol, Tocopheryl Acetate, Aloe Barbadensis Leaf Juice, Panthenol, Simmondsia Chinensis (Jojoba) Seed Oil, Citric Acid, Potassium Sorbate