Redken, products inspired by science and recommended by Pros, to give you back the power. Acidic Bonding Concentrate is a concentrated bonding treatment with citric acid to instantly transform even the most difficult hair types and textures. Citric acid is an alpha-hydroxy acid present in our bonding treatment complex that helps strengthen weakened bonds to improve the strength and resilience of hair after bleaching or coloring services. Acidic formulas of the Bonding Concentrate: -The most ACIDIC to seal the cuticles and help protect color and shine.-The most BONDING to strengthen bonds weakened by chemical services. Repairing, strengthening, and reduces breakage by 56%***.-Plus CONCENTRATED for maximum hair revitalization. Adds shine, fights frizz, and leaves hair 11 times softer**. The Acidic Bonding Concentrate shampoo gently cleanses the scalp, repairing hair and strengthening weakened bonds. It also protects color. ** Use the entire range *** Use shampoo and conditioner