1. Apply weekly to clean, damp hair, mid-length to ends. Apply sparingly on the roots. Work through with fingers.2. Leave on for 10 minutes and rinse fully.Start with 2 pumps for shoulder-length hair. Use more for longer, thicker hair. Less for fine or short hair.Tip:For better repair, use with Nº0 Intensive Bond Building Hair Treatment and Nº3 Hair Perfector once a week or as needed.Avoid contact with eyes.