The Joico K-PAK Deep Penetrating Reconstructor Treatment is great for damaged hair. It will leave your hair shiny, strong, manageable and 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 and appearance to your hair. Directions of Use: Apply to your shampooed hair Leave in for 5 minutes Rinse thoroughly