The Joico K-PAK Deep Penetrating Reconstructor Treatment is great for damaged hair. It will leave your hair shiny, strong, manageable & healthy looking. The K-PAK Reconstructor contains the highest amount of Quadramine Complex than any other product in the Joico family. This product also results in an immediately noticeable difference in strength, texture & appearance to your hair. Directions of Use: Apply to your shampooed hair Leave in for 5 minutes Rinse thoroughly