Rebonding · Professional
Rebonding Keraplex (1000ml)
The realignment step. Applied straight after Rebonding Shampoo on hair that has been dried completely, to bring the volume down and reinforce the fibre before the iron seals it in.
- Ships from the UK
- 2-step protocol
- Sold individually or as the full kit
Dispatch from 1 October 2026. Orders placed now are reserved and dispatched from that date.
What it does
Keraplex is Step 2, the realignment step, of the Rebonding straightening protocol. It harnesses the B-Plex System to reconnect broken molecular bonds within the cortex, reinforcing the hair's structure while the flat iron seals the cuticle with thermal protection.
Key actives (as on the label)
- Glyoxylic Acid, the realignment active, second ingredient on the label's INCI
- Silanetriol, structural reinforcement
- Panthenol, conditioning
- Tamarindus Indica Fruit Extract, botanical
- Argania Spinosa Kernel Oil (Argan), emollient
- Butyrospermum Parkii Butter (Shea), emollient
Formaldehyde free: the realigning active is glyoxylic acid, not formaldehyde. Also V-Label certified vegan.
When to use it
As the second and final step of the Rebonding protocol, straight after Rebonding Shampoo, on chemically resistant hair that has been dried completely and that can take an iron up to 230 degrees Celsius. Not for blonde, highlighted or sensitised hair; that hair goes to Reactive Pro instead.
How to use it
- Apply evenly through the hair, keeping 1 to 2cm away from the scalp.
- Leave for 40 minutes at room temperature. Do not shorten this pause.
- Rinse until fully removed.
- Dry the hair 100% again.
- Iron in fine sections, 10 to 15 passes per section, at 160 to 230 degrees Celsius depending on the hair's type and resistance.
What not to do
- Professional use only, adult use.
- Do not apply within 1 to 2cm of the scalp.
- Do not shorten the 40 minute pause, and do not extend it to compensate for anything else in the service.
- Do not iron the hair while it is still damp: it must be dried 100% before the first pass.
- Not for blonde, highlighted or sensitised hair: use Reactive Pro for that hair instead.
The system
Rebonding
Hair type Chemically resistant hair booked for the two step Rebonding protocol, any prior chemical history.
Not for Not sold or positioned as a stand-alone clarifying shampoo; its role is preparing the fibre for Keraplex, not a general wash. Not used on damaged or broken skin.
Rebonding is Piur London's formaldehyde free straightening protocol: it exists for chemically resistant hair carrying volume the client wants brought down, hair with the kind of natural strength that can take an iron up to 230 degrees Celsius.
A glyoxylic acid base realigns the bonds inside the cortex while the flat iron itself completes the thermal seal on the cuticle, the B-Plex System named on the Keraplex label. Deep Cleansing Purifier runs first so the fibre reaches Step 2 with even porosity from root to ends.
In the chair, confirm the hair is chemically resistant rather than blonde, highlighted or sensitised, that calls for Reactive Pro instead, then run Shampoo, dry the hair completely, apply Keraplex 1 to 2cm off the scalp, hold the 40 minute pause at room temperature without shortening it, dry completely again, then iron in fine sections.
The volume comes down and the hair still moves like hair.
Within this page, two products answer the two steps of the same service. Rebonding Shampoo is the preparation step, Deep Cleansing Purifier. Keraplex is the realignment step, B-Plex System, the formaldehyde free active that does the chemical work before the iron seals it in.
Protocol
Your Rebonding protocol
Rebonding Shampoo, Deep Cleansing Purifier
2 to 3 minutesRemoves residual build-up and equalises porosity across the fibre, so the Keraplex meets the same cortex from root to ends in Step 2.
Apply to damp hair, massage the scalp and lengths gently without rubbing, rinse thoroughly with warm water, then dry the hair completely before Step 2.
Keraplex, B-Plex System
40 minute pause, then iron 160 to 230 degrees CelsiusGlyoxylic acid realigns the bonds broken inside the cortex while reinforcing the fibre's structure, formaldehyde free.
Apply evenly through the hair, 1 to 2cm off the scalp. Leave for 40 minutes at room temperature, rinse until removed, dry the hair 100% again, then iron in fine sections, 10 to 15 passes per section, at 160 to 230 degrees Celsius depending on the hair's type and resistance.
One protocol, sold as a single decision below.
