Designed to deeply repair, rebuild and protect locks, the N°0 Intensive Bond Building hair treatment from Olaplex works to reduce breakages while shielding the hair's structure and rebuilding hair bonds. Designed as the first step in a two part treatment, it works best when paired with the N°3 Hair Perfector. The results? A visibly stronger and healthier mane. Olaplex N°0 Intensive Bond Building hair treatmentUse once a week or two to three times a week for damaged hairApplication: Apply No.0 to dry hair, fully saturating each section. Let process for 10 minutes. No.0 Hair Treatment is recommended as the first part of a two part treatment, paired with the Olaplex No.3 Hair Perfector to help strengthen and repair all types of hair. Designed to complement each other, this system works to restore the hair's healthy appearance and texture by working to repair damage and protect hair structure. Rinse, shampoo & condition. For best results, use No.4 Shampoo & No.5 Conditioner. Brush or detangle hair before applying No.0 so it can easily be absorbed. For thick, coarse, or long hair, work in small sections to ensure each area is fully saturatedVegan155ml