REDKEN REDKEN Acidic Bonding Concentrate Shampoo & Conditioner Duo 33.8 oz REDKEN Acidic Bonding Concentrate Shampoo 33.8 oz Redken Acidic Bonding Concentrate Shampoo is Redken's most concentrated all-in-one formula for strength repair for all types of damaged hair. This... $104.95 Add to Wish list Add to Cart