A powerful, clinically proven pre-shampoo treatment that leaves hair 3X stronger after just one use. No.3 is the complete bond builder to repair and strengthen hair at home by rebuilding all 3 hair bonds. Formulated for all hair types and all levels of hair health, this weekly treatment is key for your healthiest-looking hair. When used with No.4 Bond Maintenance Shampoo, it offers clinically proven results: reverses hair damage in as little as 3 minutes, results in 3X stronger hair after one use, and provides 90% smoother, better detangling, and more conditioned hair. It helps to reverse damage and strengthen hair, restoring a healthy appearance and texture while reducing future breakage. The treatment has a pH balance of 3.5-5, making it suitable for weekly at-home use to restore a satin-like shine and soft texture to dry, damaged hair. Simply comb the radiance-boosting Olaplex treatment through damp hair, allow it to work for 10 minutes, and then follow with your usual wash routine for visibly nourished, glossy, and luxuriously smooth hair.