No 4. Olaplex is a Bond Maintenance Shampoo. Repairs bonds while gently cleansing all types of hair. Impart moisture, strength, and manageability with every wash.
No. 5 Olaplex is a Bond Maintenance Conditioner. Restores, repairs, and hydrates without adding excess weight. Eliminates damaged frizz for strong, healthy, shiny hair.
Use them together and along side No. 3 and No. 6 for the healthiest of locks!