REDKEN Redken Acidic Bonding Concentrate 24/7 Night & Day Serum 3.4 oz What It Is Redken Acidic Bonding Concentrate 24/7 Night & Day Serum is a leave-in treatment designed to help repair daily hair damage while providing hydration, frizz control, and bond support. Suitable for both daytime and overnight use, the serum... $41.99 Add to Wish list Compare Add to Cart