Bis-aminopropyl diglycol dimaleate can reconnect and repair broken disulfide bonds caused by chemical processes like coloring, lightening, perming, relaxing, and through excessive heat exposure, mechanical damage such as rough brushing, teasing, and UV damage. APPLICATION and INGREDIENTS Olaplex No.1 Bond Multiplier Water (Aqua), Bis-Aminopropyl Diglycol Dimaleate, Phenoxyethanol, Sodium Benzoate. Olaplex No.0 Water (Aqua), Bis-Aminopropyl Diglycol Dimaleate, Phenoxyethanol, Sodium Benzoate. Olaplex No.2 Bond Perfector Water (Aqua), Bis-Aminopropyl Diglycol Dimaleate, etc. Olaplex No.3 Hair Perfector Water (Aqua), Bis-Aminopropyl Diglycol Dimaleate, etc. Olaplex shampoo and conditioner