Olaplex No.0 Intensive Bond Building Hair Treatment 155ml is the concentrated first step of the at-home Olaplex repair system, designed to prime dry, damaged hair before No.3 Hair Perfector. It carries the strongest dose of Olaplex patented bond-building technology found in any take-home product, sinking into each strand to rebuild broken bonds, strengthen fragile hair, and leave a smoother, healthier-looking finish.

Why It Works

Coloring, bleaching, heat tools, and the everyday stress of a hot, humid climate snap the disulfide bonds that hold hair together, leaving strands weak and prone to breakage. Olaplex No.0 floods the hair with a high concentration of bond-building actives to kickstart repair from the inside. Layered beneath No.3 Hair Perfector, the pair is clinically shown to give 68% more repair and 3x stronger hair after just one use.

Ideal For

Olaplex No.0 suits anyone with visibly damaged, over-processed, or brittle hair who wants professional-level repair without a salon visit. It is a strong match for bleached, colored, and heat-styled hair, and for strands worn down by the UAE sun, heat, and hard water. Keep in mind that No.0 is built to work with No.3 Hair Perfector rather than as a standalone treatment.

The formula stays minimal on purpose, concentrating on a single proven active:

• Bis-Aminopropyl Diglycol Dimaleate: Olaplex's patented, one-of-a-kind molecule that seeks out and relinks the broken disulfide bonds inside the hair, restoring strength and structure at the core. No.0 holds the highest concentration of it in any at-home Olaplex product.

• Lightweight, water-based delivery: free from silicones and oils, so it absorbs fast and preps hair like a primer without any heavy residue.

It is color-safe, vegan, and formulated without sulfates, parabens, phthalates, phosphates, and added protein, making it a gentle choice for chemically treated and sensitized hair.

1. On dry hair, work Olaplex No.0 through in sections from roots to ends until damp but not dripping.

2. Leave on for 10 minutes and do not rinse.

3. Apply No.3 Hair Perfector straight over the top, comb through, and wait another 10 minutes.

4. Rinse well, then wash with No.4 Shampoo and follow with No.5 Conditioner.

Use the duo weekly, or two to three times a week for badly damaged hair. Each 155ml bottle gives around 3 to 6 treatments.