Olaplex Nº.4 Bond Maintenance Shampoo — 1000 mL Hydrating, Breakage-Reducing Formula for All Hair Types

Olaplex Nº. 4 Bond Maintenance Shampoo is a concentrated, color-safe cleanser designed to reduce breakage and strengthen hair while hydrating, smoothing, and improving manageability.

This salon-grade shampoo combines gentle coconut oil–derived surfactants with Olaplex’s bond-building technology to clean without stripping moisture. It’s formulated for all hair types — from fine and straight to coily and textured — and works best when used as part of the Olaplex at-home system. The formula is sulfate-free and intended to leave hair shinier, easier to detangle, and less prone to mechanical damage from brushing and styling.

How does Nº. 4 reduce breakage during washing?

Nº. 4 targets weakened hair bonds while providing a creamy lather that lifts dirt and oil without over-drying. By protecting and reconnecting fragile linkages, it lowers the stress that causes hair to snap when wet or during styling.

• Bond-building actives help strengthen hair’s internal structure
• Coconut oil-derived surfactants cleanse gently without stripping lipids
• Hydrating ingredients keep wet hair more resilient during detangling

Will this shampoo work with color-treated or chemically processed hair?

Nº. 4 is color-safe and formulated to preserve color vibrancy while addressing damage from chemical services. It cleans effectively yet maintains moisture levels to help reduce color fading from harsh surfactants.

• Sulfate-free formulation minimizes color strip and fading
• Safe to combine with Olaplex salon and at-home treatments
• Helps smooth cuticles for enhanced shine on color-treated hair

How will my hair feel after using Olaplex Nº. 4?

After rinsing, hair typically feels cleaner, smoother, and easier to detangle, with improved slip for combing. Over repeated uses, users report reduced frizz, increased shine, and hair that handles styling with less breakage.

• Noticeably smoother texture and enhanced manageability
• Improved detangling reduces mechanical stress from combing
• Leaves hair primed for conditioners or leave-in treatments

How should I use Nº. 4 for best results?

Apply to wet hair, lather, and rinse, repeating if hair is heavily soiled or product-laden. For optimal bond repair and protection, use Nº. 4 together with Nº. 3 Hair Perfector and Nº. 5 Conditioner as a coordinated system.

• Use a quarter-sized amount for short hair; more for longer or thicker hair
• Pair with Nº. 3 and Nº. 5 for clinically supported improvements
• Follow with conditioner or targeted treatments where needed

Who is this for: Olaplex Nº. 4 Bond Maintenance Shampoo is formulated for anyone seeking to reduce hair breakage and improve strength and shine — including those with color-treated, chemically processed, curly, coily, wavy, or straight hair. It’s suitable for daily to regular use when you want a gentle, restorative cleanse that leaves hair more manageable and resilient.

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