Olaplex Nº.4 Bond Maintenance Shampoo 250 mL — Strengthens, Reduces Breakage & Hydrates

Olaplex Nº.4 Bond Maintenance Shampoo is a concentrated, bond-building cleansing formula that strengthens hair, reduces breakage, and restores moisture and shine in a single wash.

This moisturizing shampoo uses Olaplex's patented bond-building chemistry to help restore internal strength and improve manageability for medium to coarse hair types—while remaining suitable for all textures, including coily, curly, wavy, and straight. It cleanses with a gentle, coconut-derived surfactant system that creates a rich lather without stripping natural oils, leaving hair softer and easier to style.

How does Nº.4 help reduce breakage and strengthen hair?

Nº.4 targets weakened points along the hair fiber by supporting disulfide bonds with Olaplex’s signature active ingredient. Regular use improves tensile strength and reduces the appearance of split ends and snapping during combing or styling.

• Patented bond-building chemistry supports internal hair structure.
• Formulated for medium-coarse hair but safe for all textures.
• Proven clinical results when used in the Nº.3–5 system for reduced breakage.

Will this shampoo strip color or dry out my hair?

Nº.4 is color-safe and designed to cleanse without removing salon color when used as directed. Its gentle surfactant blend and added conditioning agents help retain moisture and maintain shine rather than leaving hair dry or brittle.

• Coconut oil–derived surfactants for effective yet gentle cleansing.
• Hydrating ingredients like glycerin, panthenol, and sunflower seed oil.
• Formulated to preserve hair color and natural moisture balance.

How does it improve texture, smoothness, and detangling?

The formula contains conditioning polymers and silicones that smooth the cuticle, reduce friction between strands, and make wet detangling easier. After lathering and rinsing, hair feels noticeably more manageable, with improved slip for combing or styling.

• Amodimethicone and polyquaterniums smooth and reduce frizz.
• Hydrolyzed proteins and strengthening agents enhance texture.
• Designed to work seamlessly with Nº.3 and Nº.5 for best conditioning results.

What results can I expect and how should I use it?

Use Nº.4 as your everyday cleansing step. Massage into wet hair, work into a rich lather, then rinse—follow with your preferred Olaplex conditioner or treatment for optimal performance.

• Visible improvements in shine, smoothness, and manageability after one wash.
• Clinically supported benefits when used as part of the recommended system.
• 250 mL (8.5 fl oz) size adapts well to daily use or travel-friendly routines.

Who is this for: Olaplex Nº.4 Bond Maintenance Shampoo is ideal for anyone seeking a strengthening, hydrating shampoo that reduces breakage and improves texture—especially people with medium to coarse hair or those who frequently style, color, or chemically treat their hair. It suits all hair textures (coily, curly, wavy, straight) and works best when paired with other Olaplex treatments for a complete repair and maintenance routine.

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 Pareth-7, Laureth-9, Glycerin, Trideceth-12, C12-13 Pareth-23, C12-13 Pareth-3, Hydrolyzed Vegetable Protein, Pg-propyl Silanetriol, Panthenol, Acetic Acid, Tetrasodium Edta, Pentasodium Triphosphate, Sodium Hydroxide, Disodium Edta, Helianthus Annus (Sunflower) Seed Oil, Tocopherol, Prunus Armeniaca (Apricot) Kernel Oil, Pseudozyma Epicola/Camellia Sinensis Seed Oil Ferment Extract Filtrate, Pseudozyma Epicola/Argania Spinosa Kernel Oil Ferment Filtrate, Quaternium-95, Propanediol, Helianthus Annus (Sunflower) Seed Extract, Peg-8, Euterpe Oleracea Fruit Extract, Punica Granatum Extract, Rosemarinus Officinalis (Rosemary) Leaf Extract, Musa Sapientum (Banana) Fruit Extract, Origanum Vulgare Lear Extract, Morinda Citrifolia Fruit Extract, Articum Lappa Root Extract, Peg-8/Smdi Copolymer, Sodium Hyaluronate, Palmitoyl Myristyl Serinate, Sodium Polyacrylate, Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate, Biotin, Benzoic Acid, Phenoxyethanol, Chlorphenesin, Potassium Sorbate, Sodium Benzoate, Fragrance(Parfum), Citral, Hexyl Cinnamal, Limonene