Repair a year's worth of visible damage in just one use* with Redken's award-winning Acidic Bonding Concentrate range - professional-grade care designed for all hair types and textures. The Acidic Bonding Concentrate 500ml Shampoo is a rich, all-in-one formula that delivers intense nourishment, helps prevent colour fading, and reduces breakage for stronger, healthier-looking hair. Paired with the 500ml refill pouch, your favourite Shampoo will now last longer than ever. Powered by Citric Acid, part of Redken's concentrated bonding care complex, this shampoo reinforces weakened bonds from within, boosting strength and resilience. With its acidic pH-balanced formula, it protects against the damaging effects of colouring, lightening, and heat styling, leaving hair softer, smoother, and visibly revitalised. The result? Hair that looks and feels restored, resilient, and full of life. *When used as a system of Acidic Bonding Concentrate Intensive Pre-Treatment, Shampoo, Conditioner & Leave-In vs. untreated hair