Most shampoos simply wash away surface build-up, but do little for the broken bonds beneath. Olaplex No.4 Bond Maintenance Shampoo goes deeper, cleansing while supporting damaged bonds to help hair feel stronger, smoother and more resilient from everyday stress, heat styling and chemical services.

At the heart of this formula is Bis-Aminopropyl Diglycol Dimaleate, Olaplex’s patented bond-building ingredient that targets damaged disulphide bonds within the hair. A blend of mild, sulphate-free cleansers lifts away dirt and excess oil, while panthenol, glycerin, hyaluronic acid and hydrolysed vegetable protein support hydration, smoothness and the feel of improved elasticity.

The texture is a rich, concentrated gel that lathers into a dense, cushioning foam, even in hard water. It rinses cleanly without that tight, squeaky feel, leaving hair refreshed yet comfortable, with a lightweight, glossy finish that works for daily or frequent washing.

Use as your regular shampoo, especially after colour or chemical services and heat styling. For best results, pair with Olaplex conditioners and treatments to build a consistent bond-maintenance routine that supports long-term hair strength and softness.

Patented bond-building technology works on internal hair bonds while cleansing the surface.Sulphate-free cleansing system helps minimise moisture loss and dryness during washing.Protein, humectants and emollients support the feel of increased elasticity and reduced brittleness.Antioxidant-rich botanical and oil extracts help protect hair from daily environmental stress.

Use No.4 after in-salon or at-home treatment steps such as Olaplex No.0 and No.3 to maintain the bond-building benefits between treatments. Follow with Olaplex No.5 Conditioner or an Olaplex mask and finish with styling products from the range for a cohesive strengthening routine.

A professional-grade, bond-maintenance shampoo that cleanses gently while supporting stronger, smoother, glossier-feeling hair over time.

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

• Step 1. Thoroughly wet hair with warm water to help lift surface build-up.
• Step 2. Dispense a small amount of shampoo into your palms and emulsify between hands.
• Step 3. Apply to the scalp and roots first, massaging with fingertips for 60 seconds to create a rich lather.
• Step 4. Work the lather through mid-lengths and ends, adding a little water if needed to spread evenly.
• Step 5. Rinse thoroughly until water runs clear, ensuring no residue remains.
• Step 6. Repeat if hair is heavily soiled, then follow with conditioner or treatment from the same range.

Pro Tips

• Focus the first cleanse on the scalp, then use the second pass to refresh mid-lengths and ends.
• Use lukewarm rather than very hot water to help reduce dryness and frizz.
• Gently squeeze out excess water before applying conditioner so it can absorb more effectively.
• Incorporate into your routine after chemical or heat-heavy periods to help support hair strength.