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No. 0 Intensive Bond Building Treatment. Olaplex No. 0 Intensive Bond Building Hair Treatment primes your hair for styling. Use as the first step in a two-part at-home system with No. 3 Hair Perfector (not included) for all types of hair. Redesigned for a quick and targeted stream application, the No. 0 Intensive Bond Building Hair Treatment features an easy to use nozzle that primes the hair and delivers the technology of any Olaplex at-home product. Note: Packaging for this product may vary from that shown in the image above.5.2 oz.Use: Apply slowly to dry hair, distributing evenly from root to tip. Work No. 0 into small sections by squeezing the liquid into the hair to be fully absorbed as you go. Lightly saturate from root to tip. Hair should be damp, not drenched. Let process for 10 minutes. Do not rinse. Apply No. 3 Hair Perfector (not included) over hair with No. 0 applied to it, combing through as needed.