Bond-building hair treatments are made for hair that has been lightened, coloured, heat-styled or simply brushed hard for years, and now feels weak, rough or prone to snapping. They come in four forms: a treatment used before or after you shampoo, a shampoo, a conditioner or hair mask, and a leave-in. Used together, they help damaged-looking hair feel stronger, smoother and easier to manage. Below we explain what the term means, how each step is used, and what we would choose for it.
What Does Bond-Building Mean?
Inside each hair, long chains of keratin are linked to one another, and those links help give hair its strength and spring. Lightening, colouring, high heat and rough handling all put that inner structure under strain, which is why processed lengths can feel brittle, tangle easily and lose their shine. Bond-building is the name the haircare houses give to formulas designed with that inner structure in mind. What you notice in the mirror is cosmetic: hair that feels stronger, looks smoother and is less prone to snapping when you brush and style it.
These formulas care for the lengths; they do not change how hair grows. If hair is shedding from the root, or your scalp is sore or flaking, ask your pharmacist or doctor rather than reaching for a treatment.
Who Are Bond-Building Treatments For?
They suit hair that has been through a lot: blonde and lightened hair, hair coloured at home or in the salon, hair straightened or curled most days, and long lengths that have simply been around for a while. If your hair is in good condition and rarely styled with heat, a good shampoo and conditioner may be all you need. If you colour at home, our guide Hair Colour at Home: How to Choose a Shade and a Formula sits well alongside this one.
Pre-Shampoo and In-Shower Treatments
This is the most concentrated step, and the one to begin with. Some treatments go on before you wash, so they have time in the hair before shampoo and conditioner follow; others go on clean, towel-dried hair after washing. Use them once a week, or as the house directs, and work them thoroughly through the mid-lengths and ends, where hair is oldest.
Olaplex's No. 0 Intensive Bond Building Hair Treatment is a lightweight spray that the house describes as a primer: you saturate dry hair with it, then follow with your next Olaplex step. That step is often its Hair Perfector No.3 Hair Treatment, applied to damp hair before shampooing, left for the recommended time, then washed out, as a weekly treatment for damaged, overworked or colour-treated hair. Revox B77's Revox Plex Hair Perfecting Treatment is Step 3 of its Plex routine, applied to clean, towel-dried hair and focused on the mid-lengths and ends, to help reduce the look of breakage. Schwarzkopf's R Two Bonacure Double Bonding Rescuing Treatment Hair Mask is made for very damaged hair: apply it to clean, towel-dried hair, leave it for a few minutes and rinse.
- No. 0 Intensive Bond Building Hair Treatment
- Hair Perfector No.3 Hair Treatment
- Revox Plex Hair Perfecting Treatment
- R Two Bonacure Double Bonding Rescuing Treatment Hair Mask
Bond-Building Shampoo
A bond-building shampoo keeps the routine going between treatments. Massage it into the scalp, let the rinse carry through the lengths rather than rubbing them together, and use lukewarm water where you can. Pairing it with the conditioner from the same range keeps the shelf simple, though it is not essential.
Olaplex's No. 4 Bond Maintenance Shampoo is made for all hair types and cleanses while helping hair look and feel stronger, softer and better hydrated. Redken's Acidic Bonding Concentrate Shampoo combines citric acid with a 7% bonding care complex, and leaves hair feeling cleaner, smoother and more resilient. Goldwell's Dualsenses Bond Pro Fortifying Shampoo is formulated for weak, fragile hair, with colour protection stated on the pack. Sebastian Professional's No.Breaker Bonding Shampoo, in a 250 ml bottle, is a gentle-foaming cleanse for damaged or style-stressed hair.
- No. 4 Bond Maintenance Shampoo
- Acidic Bonding Concentrate Shampoo
- Dualsenses Bond Pro Fortifying Shampoo
- No.Breaker Bonding Shampoo
Conditioner and Hair Mask
Conditioner is the everyday layer of care. Smooth it through the mid-lengths and ends, detangle gently with your fingers or a wide-toothed comb while it is in, and leave it for a minute or two before rinsing. Once a week, a hair mask in place of conditioner gives lengths that feel especially dry a richer layer.
Olaplex's No. 5 Bond Maintenance Conditioner is a daily conditioner for all hair types, made to leave hair smoother and more manageable. Alterna's Caviar Anti-Aging Restructuring Bond Repair Conditioner is a rinse-out conditioner for damaged hair that leaves it softer and easier to detangle. Kativa's Total Plex Bond Reconstruction Conditioner is formulated with its Nano Bond Complex, shea esters and amino acids, for hair that needs extra care after colouring or heat styling; leave it for a few minutes before rinsing. Alfaparf Milano's Semi Di Lino Reconstruction Bond Complex Reparative Light Mask is a lightweight mask for weekly care that helps fragile hair feel stronger and smoother without weighing it down.
- No. 5 Bond Maintenance Conditioner
- Caviar Anti-Aging Restructuring Bond Repair Conditioner
- Total Plex Bond Reconstruction Conditioner
- Semi Di Lino Reconstruction Bond Complex Reparative Light Mask
Leave-In Serums, Creams and Oils
A leave-in carries the care through the day, and through the heat of a dryer or straightener. Use a small amount on towel-dried or dry hair, keep it to the mid-lengths and ends, and add more only where the lengths still feel rough. A lighter serum or oil suits fine hair; a cream suits thicker hair or hair you style into shape.
K18's Molecular Repair Hair Oil is a lightweight oil with avocado and sunflower oils, for damp or dry hair, with thermal protection to 232 °C stated; use it sparingly and build as needed. Redken's Acidic Bonding Concentrate Hair Serum pairs citric acid and squalane with a 7% bonding care complex, and can be used morning or night. Sebastian Professional's No.Breaker Bonding & Styling Leave-In Cream combines care with a flexible hold and heat protection up to 230°C, worked through towel-dried hair and left in. Alterna's Caviar Anti-Aging Restructuring Bond Repair Leave-in Overnight Serum goes on towel-dried hair before bed and stays in until you style in the morning.
- Molecular Repair Hair Oil
- Acidic Bonding Concentrate Hair Serum
- No.Breaker Bonding & Styling Leave-In Cream
- Caviar Anti-Aging Restructuring Bond Repair Leave-in Overnight Serum
How to Build the Routine
- Once a week: a bond-building treatment, before or after shampooing as the house directs.
- Every wash: a bond-building shampoo on the scalp, then conditioner through the lengths.
- Once a week, if your ends feel dry: a hair mask in place of conditioner.
- Before heat: a leave-in serum, cream or oil on the mid-lengths and ends.
- Every day: a wide-toothed comb, a gentle towel and a moderate heat setting.
Bond-building care works best alongside kinder styling. Our guides How to Choose a Hair Dryer for Your Hair Type and How to Choose a Hair Straightener: Plates, Width and Heat explain how to set the heat to suit your hair.
In Short
Bond-building treatments are for hair that has been coloured, lightened or heat-styled and feels weaker for it. Begin with a weekly treatment, keep it going with a shampoo and conditioner, and look after the lengths with a leave-in before heat. If you add only one step, make it the weekly treatment: it is the most concentrated part of the routine, and the one you are likely to notice first.
