Olaplex Nº.4 Bond Maintenance Shampoo 1000 mL — Sulfate-Free, Strengthening & Hydrating

Olaplex Nº.4 Bond Maintenance Shampoo is a concentrated, color-safe cleanser designed to reduce breakage and strengthen hair while delivering hydration and manageability with every wash.

This sulfate-free formula combines gentle coconut oil–derived surfactants with Olaplex's bond-building technology to cleanse without stripping natural moisture. Clinically proven when used as part of the Nº.3, Nº.4, Nº.5 system, it smooths, detangles, and improves overall hair resilience across coily, curly, wavy, and straight textures. The 1000 mL / 33.8 fl oz size is ideal for home use or professional settings where frequent washing demands a long-lasting supply.

How does this shampoo help reduce breakage and strengthen hair?

Nº.4 supports hair integrity by combining mild surfactants with Olaplex’s patented bond-supporting actives so strands are less prone to snapping during washing and styling. Users report improved detangling and smoother cuticles, contributing to fewer split ends over time when integrated into a routine.

• Formulated to cleanse while maintaining internal bond structure.
• Proven reduction in breakage when used with Nº.3 and Nº.5.
• Helps smooth the hair surface for easier combing and styling.

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

Yes—Nº.4 is color-safe and free from harsh sulfates, so it cleanses without accelerating color fade or drying chemically treated hair. It’s commonly recommended by stylists for clients who want protection and longer-lasting vibrancy between salon visits.

• Sulfate-free formulation to minimize color stripping.
• Hydrating ingredients help preserve color-treated hair’s shine.
• Safe to pair with Olaplex in-salon or at-home treatments.

How will this shampoo affect different hair types: coily, curly, wavy, and straight?

Nº.4 is created to be versatile—its moisturizing base and slip help detangle dense coils while its smoothing action reduces frizz on wavy and straight hair. The result is easier styling and a more polished finish across textures when used regularly.

• Coily/curly: improves detangling and reduces knotting.
• Wavy: enhances natural pattern without weighing hair down.
• Straight: increases smoothness and shine, reducing frizz.

How should I incorporate Olaplex Nº.4 into my hair routine?

For best results, use Nº.4 as the cleansing step in a system that may include Olaplex Nº.3 Hair Perfector and Nº.5 Bond Maintenance Conditioner. Apply to wet hair, lather, and rinse thoroughly; repeat if needed. Follow with conditioner and styling products recommended for your hair type.

• Use with Nº.3 and Nº.5 for clinically measured benefits.
• Apply to roots and lengths, massage gently, then rinse.
• Ideal for frequent washers and household or salon use (1000 mL size).

Who is this for? Olaplex Nº.4 Bond Maintenance Shampoo suits anyone seeking a gentle yet effective cleanser that prioritizes bond health and moisture—salon clients, people with color-treated or chemically processed hair, and anyone with curly, coily, wavy, or straight textures who wants easier detangling, improved manageability, and reduced breakage. The 1000 mL size makes it practical for households, professionals, and people who prefer a single, reliable shampoo for regular use.

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