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. pH 2.5-3.5 Contains QUADRAMINE COMPLEX, an exclusive blend of low molecular weight and size proteins (MWS 150-2500). 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 of the hair.