Olaplex N°.4 Bond Maintenance Strengthening Shampoo — 1000 mL, Sulfate-Free Color-Safe Repair

Olaplex N°.4 Bond Maintenance™ Strengthening Shampoo is a concentrated, color-safe cleanser that repairs and fortifies hair bonds while reducing breakage with every wash.

Formulated to work on all hair types, this sulfate-free shampoo cleans without stripping moisture and supports healthier-looking hair over time. It features gentle coconut oil–derived surfactants that foam richly to remove buildup while helping preserve color and improve manageability. When used alongside other Olaplex system products, it delivers enhanced smoothing, detangling, and measurable reduction in breakage.

How does Olaplex N°.4 reduce breakage and strengthen hair?

The formula targets weakened bonds within the hair shaft to improve resilience during washing and styling. Ingredients are selected to gently cleanse while reinforcing the hair structure, so strands resist snapping and splitting more effectively after repeated use.

• Bond-building technology works to reconnect disulfide bonds inside the hair fiber.
• Gentle surfactants remove dirt without stripping natural oils or weakening strands.
• Regular use increases manageability, helping to avoid mechanical breakage from brushing.

Will this shampoo keep my color looking fresh?

Yes — N°.4 is formulated to be color-safe, helping dyed hair retain vibrancy while receiving reparative benefits. It avoids harsh sulfates that can fade pigments and instead gently lifts impurities that dull shine.

• Sulfate-free cleansing protects salon color between touch-ups.
• Hydrating action reduces the dryness that accelerates color loss.
• Pairs with Olaplex conditioners and treatments for improved color longevity.

How should I use this 1000 mL bottle for best results?

Apply a small amount to wet hair, massage into a rich lather, and rinse; repeat if desired. For optimal repair and measurable smoothing, use N°.4 as part of the Olaplex routine with Nº 3 and Nº 5 according to product directions.

• Dispense a quarter-sized amount for short hair; more for longer or thicker hair.
• Massage into scalp and lengths to lift oils and product buildup without over-drying.
• Follow with a hydrating conditioner or leave-in to lock in moisture and manageability.

What results can I expect and when will I see them?

Users typically notice smoother, shinier, and easier-to-comb hair after a few washes, with progressive reductions in breakage when used consistently. Clinical system results show improved smoothing and conditioning when combined with complementary Olaplex products.

• Smoother texture and improved detangling within early uses.
• Progressive reduction in breakage with regular system use.
• Enhanced shine and manageability as hydration and bond repair build over time.

Who is this for? Olaplex N°.4 Bond Maintenance Strengthening Shampoo 1000 mL suits anyone seeking a restorative, color-safe daily cleanser — from chemically treated and color-treated hair to naturally fragile or frequently styled strands. The large professional-size bottle is ideal for salons, households that wash frequently, or anyone wanting a long-lasting supply of a reparative, sulfate-free shampoo that supports stronger, more manageable hair.

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