Redken's Acidic Bonding Concentrate 5-Min Liquid Mask is an ultra-conditioning mask that provides deep hydration and deep repair for all hair types and hair textures. In just 5 minutes, this mask melts into hair to not only coat, but repair hair damage deep inside 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 smooth, moisturized signature touch without the weight.