Bond in 1 step with the Acidic Bonding Concentrate Treatment. Featuring Redken’s highest concentration of 14% Citric Acid and Bonding Care Complex, this 5 minute rinse-off treatment provides intensive strength repair from the inside-out*, up to 2x stronger hair** and 14x smoother results*** for all hair types and textures. Give your hair a pH-enomenal hair transformation with this small but mighty innovation. * With continued use of acidic bonding concentrate intensive pre-treatment, shampoo and conditioner verus classic shampoo. ** Repeated grooming test on bleached hair. pre-treatment + abc shampoo and conditioner vs. classic shampoo. *** Instrumental test on bleached hair vs. classic shampoo.