Intensive Treatment For Building And Repairing Damaged Hair No 0 From Olaplex; Enjoy Soft And Shiny Hair With This Intensive Treatment For Dry, Brittle And Damaged Hair. It Is An Intensive Hair Treatment That Is Used In A Two-Step System That Suits Your Hair Needs: Step 1: Acts As A Primer For Olaplex No 3 Hair Repair Enhancer & Treatment. Step 2: The High-Efficiency Formula Prepares Your Hair To Help It Absorb No Urishment, Rebuild Bonds, Strengthen Strands And Protect Them From Damage. This Product Works On Its Own But Is Best Used As A Two-Step Treatment. Use It On All Types Of Damaged Hair For Healthy, Shiny Hair Every Day."