OLAPLEX N°4 Bond Maintenance It is a shampoo that restores the internal strength of damaged hair, as well as optimal levels of hydration so that it looks healthy, shiny and manageable.
It is formulated with the brand's patented bond multiplier: the active ingredient Bis-aminopropyl Diglycol dimaleate. This acts by joining the sulfur and disolphide bonds of the hair's keratin, which are broken when we perform treatments that alter the shape or color of the hair.