The first step in Redken's Acidic Bonding Concentrate regimen, the Intensive Treatment provides strength repair in 1 use*. With Redken's highest level of Citric Acid + Bonding Care Complex, this rinse out treatment leaves hair 2x stronger* and 14x smoother*. The concentrated intensive treatment formula reinforces weakened bonds and prepares hair for the full benefits of the Acidic Bonding Concentrate Shampoo and Conditioner.