Combat 1 year of visible damage in 1 use(1) with award-winning, professional bond repair range Acidic Bonding Concentrate by Redken. Bond in 1 step with Acidic Bonding Concentrate Intensive Pre-Treatment that preps the hair for the ultimate bonding benefits. 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(2), up to 2x stronger hair(3) and 14x smoother results(4)for all hair types and textures. Give your hair a transformation with this small but mighty innovation. (1)System of Acidic Bonding Concentrate Intensive Pre-Treatment, Shampoo, Conditioner & Leave-In vs. undamaged hair (2)with continued use of acidic bonding concentrate intensive pre-treatment, shampoo and conditioner verus classic shampoo (3)repeated grooming test on bleached hair. pre-treatment + abc shampoo and conditioner vs. classic shampoo (4)instrumental test on bleached hair vs. classic shampoo