A powerful five-minute reconstructor that rebuilds & strengthens stressed, physically and/or chemically treated hair. Lost or depleted amino acids are replenished with a high concentration of Quadramine Complex for maximum reconstruction & protection from the cuticle to the cortex. With the use of Joico K-Pak Deep-Penetrating Reconstructor for Damaged Hair, weak & damaged hair is restored to its original strength & condition, helping to prevent colour loss & making your hair more responsive to styling. p H 4.5-5.5.