What Is Hair Bond Builder & How Does It Help Damaged Hair?

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What Is Hair Bond Builder & How Does It Help Damaged Hair?

WHAT IS BOND BUILDER AND HOW DOES IT HELP DAMAGED HAIR?

What Is Hair Bond Builder And How Does It Help Damaged Hair

Want to get to the root of healthy hair? You have to nourish it from the inside out. The new buzzword is bond building, and this means strengthening your hair shaft internally to make it stronger, more elastic and less prone to breakage - yes please! On the outside this looks like shiny, glossy and glowing hair that feels as good as it looks.

The ideal bond builder can repair broken bonds, boost Keratin growth and protect from further damage. As it turns out, future-proofing your hair against heat and chemicals is key. Forget overcomplicated routines, we’re all about hard-working solutions for instant and long-lasting results. But which hair treatments get the crown, and which will leave locks feeling greasy? Clearly, these are questions on everyone’s lips with the hashtag #hairtreatment reaching 5.5 billion views on TikTok.

To answer your burning questions, we spoke to the hair experts at Maria Nila about the importance of bond building to protect, strengthen and boost the health of damaged hair. Maria Nila has even released a market-first, heat protector and bond builder in one- making it easier than ever to reach your hair goals. Read on for more details about this multi-tasking bond builder and find out why it’s just what your routine is missing.

Discover our favourite bond builders:

Maria Nila Structure Repair Bond Builder 150ml, £35.60

OLAPLEX No.7 Bonding Oil 30ml, £28

K18 Biomimetic Hairscience Leave-in Molecular Repair Hair Mask Treatment for Damaged Hair, from £30

By Sephora UK Haircare Editorial Team

Writers and experts

Updated: 17 February 2026

Shop all Damaged Hair Treatments at SEPHORA UK.

Want to dive deeper into the science behind bond building? Find out more from the Maria Nila experts

Q: What is your new Bond Building product?

A: The Maria Nila Bond Builder is a leave-in treatment that combines both bond building and heat protection in one product, which has been missing on the market until now.

Our product rebuilds the internal disulfide bonds and creates a neo-cuticle around the hair that works like a suit of armour to protect from further damage. On top of that, it has an active care complex that delivers instant smoothness, shine and protects from heat up to 230C degrees.

In short, the Bond Builder a truly multitasking product that will strengthen your hair on the inside and protect it from the outside. An overall hair health boost!

Q: What is bond building and the science behind your bond builder?

A: The technology behind the Bond Builder is that it rebuilds the disulfide bonds, protecting the Keratin structure and forming a neo-cuticle around the hair shaft to protect the hair from further damage. We are proud to say that the patent for this formula is currently pending – it’s a market-first innovation and your routine needs it!

Q: How can we use your new Bond Builder product and when in the routine?

A: The Maria Nila Bond Builder complements your existing routine, perfectly matched with your favourite Maria Nila Shampoo & Conditioner. The Bond Builder is suitable for daily use and can be used on both wet and dry hair, consistently working to make your strands stronger and healthier.

Our stylist’s recommendation is to use it every other wash. Towel dry hair after shampooing twice, then spray the Bond Builder in sections for an even distribution. Follow with a mask and conditioner. However, you can use the bond builder as often as you like, so feel free to add it to your hair routine - your way.

Q: How can bond building help damaged hair?

A: Bond building helps damaged hair by repairing broken bonds inside the hair shaft, which are weakened by heat, bleaching, and chemical treatments. This makes hair stronger, more elastic, and less prone to breakage – repairing it internally. If you are looking for a heat protecting, multi-tasking product which delivers instant results, the Maria Nila Bond Builder is the one for you!