L'Oreal Paris EverPure Sulfate Free Bond Repair Pre Shampoo Treatment, When hair is colored, bleached and damaged it can become weak from within. EverPure Bond Repair system with citric acid penetrates inside the hair cortex to rebuild weak hair bonds. Repairs hair in just one use with system. Scientifically proven to strengthen hair and reduce breakage. For smoother hair than with the number one prestige routine. on wet (damaged) hair in instrumental test. Leading prestige routine based on NPD full year data.