Olaplex N.0 Intensive Bond Building Hair spray is designed with patented Olaplex Bond Building technology for deeper repair while strengthening and protecting the integrity of the hair. It works as a repair booster with N.3 hair perfector. Olaplex N.0 Intensive Bond Building Hair Treatment Spray visibly strengthens and protects the strands to minimize the appearance of damage. Infused with the highest possible concentration, the lightweight formula works as reparative hair treatment nourishes the hair to encourage a sleek, fuller-looking finish. Study showed 68% more repair when used together than without using N.3 Hair perfector. Olaplex N .0 Intensive Bond building hair spray Absorbs quickly to jumpstart repair deep within the hair strand and strengthens and rebuilds hair bonds. The patented Olaplex Bond Building technology works at a molecular level to dramatically improve hair strength, repair damage and protect all hair types. It repairs damage in 3 min and turn dry, brittle hair into soft, shiny, and more resilient hair.