Rapidly absorbed, the Nº.0 Intensive Bond Building Hair Treatment by Olaplex is infused with the brand's patented bond-building technology and formulated to boost the efficacy of the Olaplex Nº.3 Hair Perfector. It's perfect for anyone seeking deeper hair repair while strengthening and protecting its integrity.

OLAPLEX Bond Building patented Technology™, The professional hair brand that works at a molecular level to dramatically improve hair strength, repair damage and protect all hair types.

Apply to dry hair, saturating from root to ends. Leave on for 10 minutes. Don't rinse. Layer Nº.3 Hair Perfector directly over top of Nº.0 and leave on for an additional 10 minutes. Rinse thoroughly.

Water (Aqua/Eau), Bis-Aminopropyl Diglycol Dimaleate, Phenoxyethanol, Sodium Benzoate