No.0 can certainly work on it's own and will provide repair; however, the product is intended to work as a two-part process. OLAPLEX technology works best when the product is wet in the hair. No.0 is a watery liquid that will dry quickly. Using No.3 over it, keeps the hair damp so both products can continue to work during the process.
You may be thinking this sounds like a home-grade version of the salon professionals only Stand Alone Treatment. The Stand Alone Treatment is the ultimate OLAPLEX experience; it intensively repairs hair and remains to be the most concentrated OLAPLEX experience. No.0 contains less of the active ingredient used in step one of the Stand-Alone Treatment. With salon time reduced and COVID-19 restrictions, clients can perform the No.0 treatment at home to reduce the time spent in the salon.
No.0 is your very own salon-like treatment at home to elevate the integrity of your hair!