Olaplex Nº.4C Clarifying Deep Cleansing Shampoo — 8.5 fl oz, Weekly Detox for Color-Safe Bond Protection & Buildup Removal

Olaplex Nº.4C Bond Maintenance™ Clarifying Deep Cleansing Shampoo is a weekly detox wash that lifts damage-causing buildup and minerals while protecting hair bonds to restore shine and color vibrancy.

Designed to remove the kinds of deposits that weigh hair down—like chlorine, heavy metals, pollution particles, and styling residue—this pH-optimized clarifying shampoo cleans deeply without harsh sulfates. It produces a rich, refreshing lather that helps lift the cuticle so treatments and repair products can penetrate more effectively. Suitable for all textures and porosities, Nº.4C is formulated to preserve color and reinforce hair resilience while prepping strands for follow-up repair steps.

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

This formula uses a broad-spectrum clarifying system that targets dissolved minerals and sticky residue to free the hair surface. The shampoo lifts deposits from the cuticle and rinses them away without over-drying, leaving hair ready for conditioning and repair.

• pH-optimized to open the cuticle for effective lift
• Removes chlorine, heavy metals, and pollution particles
• Breaks down excess oil and styling product residue
• Does not rely on SLS/SLES sulfates to avoid harsh stripping

Will this clarifying shampoo damage color-treated or chemically processed hair?

Nº.4C is formulated to be color-safe and suitable for chemically treated hair; it clears deposits that can make color look dull without aggressive stripping. Because it’s designed for weekly or as-needed use, it refreshes color vibrancy while preserving treatment results.

• Color-safe formulation protects dyed hair hues
• Gently lifts surface buildup that mutes color reflection
• Dermatologist-tested and vegan for sensitive scalps
• Use frequency: once weekly or when buildup appears

How does Nº.4C support hair repair routines and strengthen bonds?

By clearing away debris that blocks product absorption, this cleansing shampoo prepares hair to receive reparative treatments and conditioners more effectively. It also works in tandem with Olaplex bond-building technology, reinforcing strand resilience to reduce future breakage risk.

• Enhances penetration of masks and leave-ins after cleansing
• Helps maintain the efficacy of bond-repair products
• Contributes to smoother, shinier hair that resists breakage
• Suitable for straight, wavy, curly, and coily textures

How do I use Nº.4C for best results?

Apply to wet hair as a weekly clarifying step or when you notice buildup—massage into scalp, work through lengths, then rinse thoroughly. Follow with your preferred Olaplex conditioner or treatment to lock in moisture and repair benefits.

• Use once a week or as needed for heavy build-up
• Massage gently to target scalp and roots where deposits accumulate
• Rinse fully and follow with a conditioning or bond-repair step
• Safe for all hair textures and porosities

Who is this for: Olaplex Nº.4C Clarifying Deep Cleansing Shampoo is ideal for anyone noticing dullness, stiffness, or limpness caused by hard water, pool chemicals, pollution, or heavy styling products. It’s recommended for people with color-treated, chemically processed, or natural hair who want a non-stripping weekly detox that improves shine, restores color clarity, and helps maximize the results of bond-repair and conditioning treatments.

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.