Redken Acidic Bonding Concentrate 5-Minute Liquid Mask is an ultra-conditioning mask that provides deep hydration and deep repair for all hair types and textures. In just 5 minutes, this mask melts into the hair to not only cover, but also repair hair damage deep within the hair. Formulated with our most intensive conditioning care complex, a high concentration of cationic agent and conditioning oils, this mask offers immediate detangling and a soft, hydrated touch without weight.