Olaplex No. 0 Intensive Bond Building Treatment is a professional-inspired pre-treatment meticulously formulated to prime and prepare visibly damaged hair for optimal repair and nourishment absorption. This potent liquid treatment features the highest concentration of patented Olaplex bond-building technology, working to rebuild hair bonds, significantly boost overall strength, and protect hair integrity from within. For best results, apply thoroughly to dry hair, ensuring full saturation, then leave for ten minutes before following with your preferred hair perfector to maximise its restorative benefits