Redken Acidic Bonding Concentrate NZ: For Damaged, Bleached Hair

If your hair has been through a few rounds of lightener and now snaps when you brush it through wet, you already know the feeling. The mid-lengths go gummy, the ends turn to candy floss, and no amount of conditioner seems to hold it together past wash day. This is exactly the hair Redken built Acidic Bonding Concentrate for, and it's one of the ranges our colourists reach for when a client walks in with over-processed, bleached hair that needs strength back fast.

Here's an honest look at what the range actually does, who it suits, and how we use it in the salon so you can get the same result at home.

What is Redken Acidic Bonding Concentrate?

Acidic Bonding Concentrate (ABC for short) is Redken's bond-repair system for damaged and chemically treated hair. The whole line is sulfate-free and built around two things: citric acid and Redken's Bonding Care Complex.

Citric acid is an alpha hydroxy acid, and it does the unglamorous-but-important job of bringing your hair back to its optimal slightly acidic pH. Bleaching, perming and even some shampoos leave hair sitting too alkaline, which keeps the cuticle swollen and lifted. When the cuticle won't lie flat, moisture leaks out, colour fades faster and the surface feels rough and dull. The acidic formula helps that cuticle close back down, which is where the shine and smoothness come from.

The Bonding Care Complex works deeper, reinforcing the weakened internal bonds that bleach and heat break apart. Think of it as repairing the scaffolding inside each strand rather than just coating the outside. That combination is why ABC suits hair that is genuinely damaged and broken, not just a bit dry.

Why bleached hair needs bond repair, not just moisture

A lot of people reach for a rich mask when their hair feels fried, and moisture does help. But there's a difference between hair that's thirsty and hair that's structurally weak. Bleaching lifts the cuticle and breaks the bonds that give hair its strength and elasticity. Once those bonds are broken, a moisturising mask alone is like putting a soft blanket over a cracked beam. It feels better for a day, but the underlying weakness is still there.

The tell-tale signs you need bond repair rather than just hydration:

• Hair that stretches like chewing gum when wet and then snaps
• Mid-lengths and ends that feel rough or spongy after lightening
• Breakage and short broken hairs around the crown and hairline
• Colour and toner that fade or go brassy faster than they should

If that sounds like your hair, a bonding system is the better starting point. You can layer in extra moisture afterwards, and we'll come back to that.

The Redken Acidic Bonding Concentrate range, explained

The range is designed to work as a system, but each piece earns its place. Here's how we'd build it for bleached, damaged hair.

Bonding Shampoo and Conditioner

The sulfate-free shampoo cleanses gently so you're not stripping already-fragile hair, while delivering that first hit of citric acid and bonding care. The matching conditioner follows through with slip and surface repair so wet detangling stops being a battle. This duo is the everyday backbone of the routine, and using them together is what gives you the cumulative strengthening over a few weeks.

Leave-In Treatment

This is the hero of the line and the one we recommend most often. The Acidic Bonding Concentrate Leave-In Treatment delivers strength repair in a single use, gives heat protection up to 230°C, and Redken's testing shows an 88% visual reduction in split ends with 2x less breakage. You spray it through damp hair before drying and styling, so it's pulling double duty as repair and heat shield. For anyone who blow-dries or uses irons, this is the non-negotiable step. Browse our wider leave-in treatments if you want to compare options.

5-Minute Liquid Mask

For a deeper weekly treatment, the ultra-conditioning mask sits in the routine where you'd normally use a regular conditioner, once or twice a week. It's a fast in-shower step that tops up both bond repair and moisture. You'll find it among our masks and treatments.

How to use it: a salon-grade weekly routine

Here's the rhythm we'd set a client up with after a heavy lightening service:

• Every wash: Bonding Shampoo, then Conditioner from mid-lengths to ends. Rinse with cool water to help seal the cuticle.
• Once or twice a week: Swap the conditioner for the 5-Minute Liquid Mask. Leave it the full five minutes, comb through, rinse.
• Every time you heat style: Spray the Leave-In Treatment through damp hair before drying. Don't skip this even on air-dry days, as it's still repairing.

Consistency matters more than intensity here. Bond repair is cumulative, so a steady routine over four to six weeks will do far more than one dramatic treatment.

Where Redken fits alongside our other repair ranges

Redken Acidic Bonding Concentrate is a brilliant, accessible bond-repair system, and it's a natural fit for anyone who is blonde or highlighted and battling breakage. If your hair has gone through heavy bleach and you're also worried about brassiness or that gummy, over-toned feel, it's worth knowing about Redken's stablemate L'Oréal Absolut Repair for deeply damaged hair, and L'Oréal Metal Detox, which targets the metal ions in your water that make colour fade and lightener behave unpredictably.

For our clients who want the most luxurious version of bond and fibre repair, Kérastase is the premium range our colourists use daily, and the Kérastase Blond Absolu line is built specifically for lightened and sensitised blonde hair. Both Redken and Kérastase sit under the same professional umbrella, so it really comes down to your budget and how intensively your hair has been processed. Browse the full Redken range to see what suits.

Genuine Redken, shipped across New Zealand

We're a working Queenstown salon and an authorised stockist, so every bottle is genuine professional Redken, the same stock we use on the salon floor. We ship nationwide, with free NZ shipping on orders over $99, so whether you're in Auckland, Christchurch or somewhere in between, you can keep your bleached hair on a proper repair routine between appointments.

If you're not sure whether the leave-in alone will do or you need the full system, our team is happy to point you in the right direction based on how processed your hair is.

Shop the full Redken Acidic Bonding Concentrate range at Crew and get genuine bond repair delivered across New Zealand.

Frequently asked questions

Is Redken Acidic Bonding Concentrate good for bleached hair?

Yes. It's one of the ranges our colourists reach for on over-processed, bleached hair. The citric acid and Bonding Care Complex reinforce the internal bonds that lightener breaks and bring hair back to its optimal acidic pH, which helps seal the cuticle and reduce breakage.

What does the citric acid in Acidic Bonding Concentrate actually do?

Citric acid is an alpha hydroxy acid that helps return hair to its slightly acidic optimal pH. Bleaching and chemical services leave hair too alkaline, which keeps the cuticle lifted. The acidic formula helps the cuticle close back down for better shine, smoothness and colour retention.

Which Redken Acidic Bonding Concentrate product is best to start with?

The Leave-In Treatment is the one we recommend most. It delivers strength repair in one use, gives heat protection up to 230°C, and Redken's testing shows an 88% visual reduction in split ends with 2x less breakage. Pair it with the sulfate-free shampoo and conditioner for cumulative results.

Is Redken Acidic Bonding Concentrate sulfate-free?

Yes, the Acidic Bonding Concentrate range is sulfate-free, so it cleanses gently without stripping already-fragile, colour-treated hair.

Do you ship Redken across New Zealand?

Yes. Crew is a Queenstown salon and authorised Redken stockist, so all stock is genuine professional product. We ship nationwide with free NZ shipping on orders over $99.