ACIDIC BONDING CONCENTRATE amino protein 10 x 10 ml ACIDIC BONDING CONCENTRATE amino protein 10 x 10 ml is a special blend of amino acids, proteins, and other natural ingredients designed to strengthen and nourish hair. It helps to reduce breakage and repair split ends, while also providing a protective barrier against heat and styling damage. This product is recommended for all hair types and is great for those with color-treated hair.