Replenish the look of tired hair with the innovative & intensive bond builder. The lightweight formula glides through the hair effortlessly, absorbing fast to avoid any kind of heavy, greasy residue being left over. Infused with the highest possible dose of Olaplex technology, the ingenious bond-builder treatment works as a primer for the No.3 Perfector, effectively & gently prepping your tresses to promote the look of stronger, healthier & bouncier locks. An enrichment of Bis-Aminopropyl Diglycol Dimaleate drenches heat & chemical-damaged hair in goodness, locking in moisture for long-lasting, touchable softness.