Olaplex Nº.4C Clarifying Deep Cleansing Shampoo, 8.5 fl oz — Color-Safe, Removes Buildup & Hard-Water Minerals

Formulated to target the minerals, chlorine, pollution, excess oil, and product residue that accumulate on scalp and strands, Nº.4C is pH-optimized to cleanse deeply without harsh sulfates. It produces a refreshing, abundant lather that clears impurities while helping hair repair routines work more effectively. Use it once a week or whenever heavy buildup dulls your color or texture.

How does Nº.4C remove hard-water minerals and environmental buildup?

The formula contains a broad-spectrum clarifying system designed to chelate and lift minerals and pollutants from the hair surface. Its pH balance helps slightly open the cuticle so trapped particles can be released during rinsing, leaving strands cleaner without excessive dryness.

• Targets chlorine, heavy metals, and common hard-water minerals
• Removes pollution and airborne residue that mattes color and shine
• Rinses away silicones and styling buildup to refresh hair texture

Will this strip my color or dry out my hair?

Nº.4C is formulated without SLS/SLES and is labeled color-safe to avoid aggressive stripping while still clarifying. It cleans deeply but is designed to preserve color vibrancy and leave the hair feeling soft, not brittle—especially when followed by your usual conditioning and bond-building routine.

• Color-safe formula suitable for chemically treated hair
• No SLS/SLES to reduce harsh drying effects
• Pairs with conditioners and treatments to lock in softness and manageability

How often should I use this clarifying shampoo and on which textures?

Use Nº.4C weekly or as-needed when buildup, dullness, or weighed-down strands are noticeable. It’s formulated for all textures — straight, wavy, curly, and coily — and works across fine, medium, and coarse hair as well as all porosity levels.

• Weekly use recommended; increase only when exposed to heavy buildup (pools, hard water, hard styling)
• Safe for fine to coarse hair and all curl patterns
• Effective across low to high porosity hair types

How does Nº.4C support my bond-building or repair routine?

By removing residue that blocks product penetration, this clarifying shampoo improves the performance of subsequent bond-repair treatments and conditioners. Clean cuticles allow repair ingredients to reach the cortex more effectively, helping treatments work as intended.

• Prepares hair for Olaplex treatments and other repair products
• Strengthens and reinforces bonds indirectly by improving product absorption
• Maximizes efficacy of your existing hair-repair regimen

Who is this for? Nº.4C is for anyone needing a reliable clarifier that lifts mineral and product buildup while protecting color and supporting repair routines. It’s a weekly solution for swimmers, travelers, heavy-product users, and anyone whose hair looks dull or weighed down from environmental exposure—suitable for all textures and chemically treated hair seeking restored vibrancy and improved 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.