Olaplex Nº.4C Clarifying Deep Cleansing Shampoo, 8.5 oz — Color-Safe, SLS/SLES-Free Weekly Treatment

Olaplex Nº.4C Bond Maintenance™ Clarifying Deep Cleansing Shampoo is a weekly, pH-optimized clarifying treatment that lifts residue, removes minerals and pollutants, and restores color vibrancy without stripping hair.

Use Nº.4C once a week or as needed to dissolve buildup from hard water minerals, chlorine, pollution, excess oil, and styling products. Its broad‑spectrum clarifying system is formulated without SLS/SLES, so it creates a thorough, refreshing lather that cleanses while preserving color and helping hair feel softer and shinier. Designed to work on all textures and porosities, it supports the Olaplex repair routine by maximizing the performance of subsequent treatments.

How does Nº.4C remove stubborn buildup without stripping hair?

This formula is pH‑optimized to gently lift the cuticle and dislodge particulate buildup—like mineral deposits, chlorine, and heavy metals—while surfactants rinse them away. Because it excludes SLS and SLES, the shampoo cleans thoroughly without leaving hair dry or brittle.

• pH‑adjusted formula to lift the cuticle temporarily
• Broad‑spectrum clarifying system targets minerals, pollution, and product residues
• SLS/SLES‑free surfactants to avoid over‑stripping
• Rich lather for an effective rinse that leaves hair manageable

Will Nº.4C help colored or chemically treated hair?

Yes—Nº.4C is color‑safe and formulated to restore vibrancy by removing the film and deposits that dull color. It prepares hair for repair and conditioning steps so color and tone appear brighter and more luminous after treatment.

• Safe for chemically treated and color‑treated hair
• Removes residue that can mute color shine and depth
• Preps strands to receive conditioning and bond‑repair products more effectively
• Helps maintain salon color between professional services

How often should I use this clarifying shampoo on different hair types?

Use Nº.4C weekly for most people; increase frequency only if you swim often, live in hard‑water areas, or use heavy styling products. It’s formulated for straight, wavy, curly, and coily hair, across fine to coarse textures and all porosity levels.

• Weekly as a general clarifying treatment
• After swimming or exposure to chlorine and saltwater
• When hard water or pollution leaves hair feeling dull or weighed down
• Before deep‑repair or conditioning steps to improve efficacy

How does Nº.4C fit into my Olaplex routine?

Nº.4C is intended as a preparatory clarifying step that improves the results of Olaplex bond‑repair treatments and conditioners. By removing barriers on the hair surface, it allows reparative actives and conditioners to penetrate more effectively, so follow with your chosen Olaplex repair and moisturizing products.

• Use prior to Olaplex bond‑strengthening treatments for best absorption
• Rinse thoroughly, then apply mask or conditioner
• Improves the performance of leave‑ins and serums applied afterward
• Helps maintain long‑term shine and softness when used regularly

Who is this for? Nº.4C is ideal for anyone seeking a powerful clarifying shampoo that removes damaging impurities—especially swimmers, city dwellers, and users of heavy styling products—without sacrificing color or adding dryness. It suits all hair textures and porosities, and pairs with Olaplex treatments to strengthen and protect hair while restoring visible vibrancy and softness.

Ingredients

Water (Aqua/Eau), Sodium Lauroyl Methyl Isethionate, Cocamidopropyl Hydroxysultaine, Sodium Lauroyl Glutamate, Coco-Betaine, Disodium Laureth Sulfosuccinate, Acrylates Copolymer, Cocamidopropyl Betaine, Cocamidopropylamine Oxide, Sodium Methyl Oleoyl Taurate, Decyl Glucoside, Bis-Aminopropyl Diglycol Dimaleate, Sodium Lauryl Sulfoacetate, Phenoxyethanol, Coco-Glucoside, Lauryl Glucoside, Chlorphenesin, Panthenol, Trisodium Ethylenediamine, Disuccinate Ethylhexylglycerin, Sodium Benzoate, Polyquaternium-11, Benzoic Acid, Sodium PCA , Pentasodium Triphosphate, Sodium Lactate, Arginine, Aspartic Acid, PCA, Citric Acid, Glycine, Alanine, Serine, Valine, Isoleucin, Proline,Threonine, Histidine, Phenylalanine, Fragrance (Parfum), Citral, Hexyl Cinnamal, Limonene.