Olaplex Nº.4 Bond Maintenance Shampoo — 100 mL Hydrating, Breakage-Reducing Cleanser for All Hair Types

Olaplex Nº.4 Bond Maintenance Shampoo is a concentrated, color-safe cleansing formula designed to reduce breakage and leave hair smoother, shinier, and easier to manage after each wash.

This shampoo is formulated to gently cleanse while protecting and reinforcing hair bonds, so it works on all textures — from fine and straight to coily. It creates a rich lather from coconut-derived surfactants that removes build-up without stripping moisture, helping maintain a hydrated scalp and softer hair. Use with Olaplex Nº.5 or your regular conditioner for everyday care or pair with Nº.3 and Nº.5 for the clinically tested system benefits.

How does this shampoo reduce breakage and strengthen hair?

Nº.4 supports hair structure by preserving and reinforcing bonds during cleansing, which helps minimize mechanical and chemical breakage. It’s designed to be part of a routine that improves manageability and resilience over time without harsh detergents.

• Formulated to preserve internal hair bonds while shampooing.
• Cleanses without over-drying, reducing brittleness and snap.
• Clinically shown improvements when used in a system with Nº.3 and Nº.5.

Will it work on my hair type — curly, coily, wavy, or straight?

Yes — the gentle, concentrated formula is suitable for all hair textures and is color-safe, so it won’t strip salon color. It’s lightweight enough for fine hair and nourishing enough for textured, dry strands, balancing moisture and slip for easier styling.

• Safe for color-treated and chemically relaxed hair.
• Hydrates and smooths curls and coils without weighing them down.
• Improves detangling and shine on straight and wavy hair.

How should I use Nº.4 to get the best results?

Apply to wet hair, lather thoroughly, and rinse; follow with a conditioner like Nº.5 or your preferred conditioning product. For optimal bond repair and breakage reduction, incorporate Nº.3 as a weekly treatment and use Nº.5 daily for added hydration and smoothness.

• Use daily or as needed for cleansing and maintenance.
• Pair with Nº.5 for routine conditioning; add Nº.3 weekly for a full system effect.
• Concentrated formula: a little goes a long way to create rich lather.

What key ingredients make it gentle yet effective?

The formula relies on coconut oil–derived surfactants that generate abundant foam while preserving moisture. It avoids harsh sulfates and combines cleansing agents with conditioning actives to detangle and soften hair during wash.

• Coconut-derived surfactants for a gentle, hydrating lather.
• Conditioning agents that improve detangling and manageability.
• Color-safe formulation to protect dyes and treated hair.

Who is this for: Olaplex Nº.4 Bond Maintenance Shampoo is intended for anyone seeking a stronger, smoother wash routine — from people with color-treated or chemically processed hair to those with naturally dry or easily tangled textures. If you want a daily shampoo that cleans effectively without stripping moisture and pairs well with targeted Olaplex treatments for measurable smoother, more manageable hair, Nº.4 is a reliable addition to your regimen.

Ingredients

Water/Aqua/Eau, Sodium Lauroyl Methyl Isethionate, Cocamidopropyl Hydroxysultaine, Potassium Cocoyl Glycinate, Disodium Cocoyl Glutamate, Sodium Lauroyl Sarcosinate, Potassium Cocoate, Decyl Glucoside, Glycereth-26, Bis-Aminopropyl Diglycol Dimaleate, Cocamidopropylamine Oxide, Disodium Laureth Sulfosuccinate, Glycol Distearate, Sodium Cocoyl Glutamate, Methyl Gluceth-20, Acrylates Copolymer, PEG-120 Methyl Glucose Dioleate, Amodimethicone, Citric Acid, Sodium Lauryl Sulfoacetate, Polyquaternium-10, Ethylhexylglycerin, Divinyldimethicone/Dimethicone Copolymer, Polyquaternium-11, Trisodium Ethylenediamine Disuccinate, Guar Hydroxypropyltrimonium Chloride, C11-15 Alketh-7, Laureth-9, Glycerin, Trideceth-12, C12-13 Alketh-23, C12-13 Alketh-3, Panthenol, Acetic Acid, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Pentasodium Triphosphate, Glyoxal, Sodium Hydroxide, Helianthus Annuus (Sunflower) Seed Oil, Disodium EDTA, Tocopherol, Prunus Armeniaca (Apricot) Kernel Oil, Pseudozyma Epicola/Argania Spinosa Kernel Oil Ferment Filtrate, Pseudozyma Epicola/Camellia Sinensis Seed Oil Ferment Extract Filtrate, Quaternium-95, Propanediol, Helianthus Annuus (Sunflower) Seed Extract, PEG-8, Euterpe Oleracea Fruit Extract, Punica Granatum Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Musa Sapientum (Banana) Fruit Extract, Origanum Vulgare Leaf Extract, Morinda Citrifolia Fruit Extract, Arctium Lappa Root Extract, PEG-8/SMDI Copolymer, Sodium Hyaluronate, Palmitoyl Myristyl Serinate, Sodium Polyacrylate, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Biotin, Phenoxyethanol, Chlorphenesin, Benzoic Acid, Potassium Sorbate, Sodium Benzoate, Fragrance (Parfum), Hexyl Cinnamal, Limonene, Citral