UKIYO · Journal

Bond-Building Treatments Explained: Wellaplex vs Olaplex vs Kérastase Première vs Redken ABC (NZ)

"Bond building" gets used as a buzzword, so here's the plain version: these products rebuild the internal links inside your hair that bleach, heat and colour break down. Used right, they're the difference between hair that snaps and hair that stretches.

Every brand now has one. They are genuinely good, and the right pick depends on how damaged your hair is and what else is going on. Here's how we choose at the basin.

Wella Wellaplex No.3

The at-home step of the in-salon Wellaplex system. If your hair is freshly lifted or balayaged, a weekly Wellaplex No.3 treatment keeps the bonds we rebuilt in the chair holding. Simple, effective, and the one we recommend for blondes maintaining a big colour change.

Kérastase Première

Kérastase's newest repair range, and the most sophisticated. It does something clever — it decalcifies first (removes the mineral build-up from hard water that makes hair stiff and dull) and then fills and repairs. If your hair feels rough, looks dull, and you're on bore or hard water, Première Bain Décalcifiant Réparateur is the standout. Central Otago water makes this more relevant than people realise.

Redken Acidic Bonding Concentrate

The workhorse. Brilliant all-rounder for over-processed, breakage-prone hair, and the ABC leave-in / Treatment is one of the best-value bond products in the salon. Our full comparison: Redken ABC vs Olaplex.

Sebastian NO.BREAKER

A full bonding ritual that claims up to 20x stronger hair when used together. The NO.BREAKER bonding shampoo is a great entry point if you want bond support built into your everyday wash rather than a separate step.

How to actually use a bond builder

Most are a weekly treatment, applied to damp hair, left 5-10 minutes, then rinsed (some, like ABC leave-ins, stay in).
They repair, they don't waterproof — keep heat tools at a sensible temperature and use a heat protectant.
Bond builders are not a substitute for a trim if you have splits — they stop new breakage, they can't glue a split back together permanently.

Dry rather than damaged? Start with our dry-hair guide instead.

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