NWT - unopened/sealed Description: The Nº.0 Intensive Bond Building Hair Treatment, infused with patented OLAPLEX Bond Building technology is an intense treatment that boosts the efficacy of OLAPLEX Nº.3 Hair Perfector for deeper repair while strengthening and protecting the integrity of the hair. Ingredients: Water (Aqua/Eau), Bis-Aminopropyl Diglycol Dimaleate, Phenoxyethanol, Sodium Benzoate