Joico K-Pak Professional Cuticle Sealer, this double-action pH neutralizer and cuticle sealer is an acidifier that smoothes and tightens the cuticle, and locks in curl and colour. The low pH formula reduces hair swelling caused by chemical services, such as tinting, lightening, straightening and perming. It deactivates and removes ammonia and peroxide residues while eliminating perm odours. This balance of 19 essential amino acids (the building blocks of hair) adheres quickly and effectively to ensure maximum protection and reconstruction from the cuticle to the cortex. Directions: Apply to damp hair after shampooing. Work through the hair, concentrating on the ends. Style as usual.