Redken Acidic Bonding Concentrate Intensive Treatment is a pre-shampoo rinse-out treatment that provides strength repair in one use, reinforcing weakened bonds and preparing hair for the full benefits of the Acidic Bonding Concentrate Shampoo and Conditioner. This concentrated intensive treatment formula contains Redken's highest level of Citric Acid + Bonding Care Complex, providing 14x smoother hair and 63% less breakage for all hair types and textures. Its pH balancing acidic formula helps bring hair back to a healthy range, while its alpha hydroxy acid, Citric Acid, reinforces weakened bonds.