Professional hair smoothing treatment
Hair Controller.
QIQI Hair Controller permanently controls frizz, texture, and volume. Formaldehyde-free. Cysteine-based. Lasts up to 5 months. Three formulas — one for every hair type. Designed for salon and home use.
The concept
What is a hair controller?
A hair controller is a professional smoothing and straightening treatment that permanently controls frizz, texture, and volume. The name comes from what it does — it gives you total control over your hair, whether you want it smooth, relaxed, or simply frizz-free.
Unlike a traditional keratin treatment that coats the hair surface and washes out after 8–12 weeks, a hair controller restructures the internal bonds of the hair strand itself. Unlike a Brazilian blowout that relies on formaldehyde or aldehyde derivatives for results, a hair controller uses cysteine — a naturally occurring amino acid — activated by heat. Unlike a chemical relaxer that breaks bonds aggressively and permanently, a hair controller softens bonds gently, preserving the hair's natural integrity.
QIQI Hair Controller is the leading hair controller brand in the UK. It is 100% formaldehyde-free, produces no toxic fumes, and is designed for both salon professionals and home users. Results last up to 5 months on treated hair.
Hair controller vs alternatives
Keratin Treatment
Coats hair surface with keratin protein. Temporary — washes out in 8–12 weeks. Often contains formaldehyde or aldehyde derivatives.
Brazilian Blowout
Surface-level smoothing sealed with heat. Results fade over 10–12 weeks. Many formulas rely on methylene glycol, which releases formaldehyde gas.
Chemical Relaxer
Breaks disulfide bonds permanently with sodium hydroxide or guanidine hydroxide. Harsh on hair. High risk of damage and breakage over time.
Hair Controller
Restructures internal bonds with cysteine. Permanent on treated hair — lasts up to 5 months. Zero formaldehyde. Safe for home use. Preserves hair integrity.
The science
How hair controller works.
QIQI Hair Controller uses a cysteine-based formula that softens the disulfide bonds inside each hair strand. When activated by heat, the bonds reform in a smoother configuration — permanently controlling frizz, texture, and volume.
Step 01
Cleanse
Hair is washed with a clarifying shampoo to remove buildup and open the cuticle layer for maximum product absorption.
Step 02
Apply
Hair Controller formula is applied section by section from root to tip, ensuring even saturation throughout.
Step 03
Process
The cysteine formula penetrates the hair fibre and softens the disulfide bonds. Processing time depends on hair type and texture.
Step 04
Seal
Heat from a flat iron seals the bonds in their new, smoother configuration. The result is permanent on treated hair.
Three formulas — one for every hair type
Choose your hair controller.
Every hair type responds differently to smoothing treatments. QIQI Hair Controller comes in three targeted formulas — each calibrated for a specific texture and condition. Choose the one matched to your hair for the best results.
From £119 · 150g
Hair Controller — Thick & Coarse
Formaldehyde-free permanent smoothing treatment for thick, coarse, and afro-textured hair. Softens disulfide bonds under heat for lasting frizz control — from defined curls to fully straight. QIQI Hair Controller results last up to 5 months.
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From £119 · 150g
Hair Controller — Wavy & Curly
Permanently reduces frizz and enhances natural pattern definition — or delivers a smooth, controlled finish. Designed specifically for wavy and curly hair. Formaldehyde-free. Lasts up to 5 months.
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From £119 · 150g
Hair Controller — Thin & Delicate
Formaldehyde-free permanent smoothing for fine, colour-treated, or delicate hair. Eliminates frizz and reduces volume without over-processing. QIQI Hair Controller safe for bleached and highlighted hair. Results last up to 5 months.
Shop now →Not sure which formula? Take the 60-second quiz for a personalised recommendation →
Everything you need in one box
Hair controller kits.
Get your hair controller treatment bundled with aftercare and application tools. Each kit includes your chosen formula — pick your hair type at checkout.
£159 · Controller 150g + Shampoo 75ml + Conditioner 75ml
Qiqi Starter Kit
Everything you need to start. Includes your chosen QIQI Hair Controller formula, sulfate-free Smooth Service Shampoo 75ml, and Hydration Fixation Conditioner 75ml. Formaldehyde-free keratin treatment with matched aftercare in one starter bundle.
Shop now →£215 · Controller 150g + Shampoo 75ml + Conditioner 75ml + Masque 75g
Qiqi Full System
The complete Qiqi system — treatment and travel-size aftercare in one box. Includes your chosen Hair Controller formula, Smooth Service Shampoo 75ml, Hydration Fixation Conditioner 75ml, and Super Soaker Masque 75g. Salon quality from home, start to finish.
Shop now →£169 · Full kit — up to 3 treatments
DIY Treatment Kit
Professional keratin treatment at home — up to 3 applications per kit. Choose your QIQI Hair Controller formula and follow the step-by-step guide. Formaldehyde-free. Includes heated cap, applicator brush, bowl, and gloves. Results last up to 5 months.
Shop now →By the numbers
Hair controller results.
Duration
Up to 5 months
Formaldehyde
Zero
Treatments per bottle
3+
Cost per treatment
~£40
Home use
Yes
Drying time reduction
50%
Common questions
Hair controller — FAQ
What is a hair controller?
A hair controller is a professional hair smoothing and straightening treatment that permanently controls frizz, texture, and volume. Unlike temporary treatments that wash out, a hair controller restructures the internal bonds of each hair strand using heat-activated cysteine — delivering smooth, manageable hair that lasts for months. QIQI Hair Controller is the leading hair controller brand in the UK.
How does hair controller work?
Hair controller works by using a cysteine-based formula that softens the disulfide bonds inside your hair when activated by heat. The treatment is applied section by section, left to process, then sealed with a flat iron. This restructures the hair fibre from the inside — permanently smoothing frizz, reducing volume, and controlling texture on the treated hair. New growth remains untreated and can be topped up.
How long does hair controller last?
QIQI Hair Controller results last up to 5 months on treated hair. The smoothing is permanent on the hair that has been treated — it does not wash out or fade like a keratin treatment or Brazilian blowout. As new hair grows in, you may notice regrowth texture at the roots, which can be treated with a top-up application.
Can I use hair controller at home?
Yes. QIQI Hair Controller is designed for both professional salon and home use. Because it is 100% formaldehyde-free, there are no toxic fumes during application — making it safe to use in a normal bathroom without commercial ventilation. The DIY Treatment Kit includes everything you need: treatment, heated cap, applicator brush, bowl, and gloves.
Which hair controller is right for my hair?
QIQI Hair Controller comes in three formulas matched to your hair type. Thick & Coarse is for afro-textured, thick, and coarse hair. Wavy & Curly is for wavy and curly hair that needs frizz control or pattern definition. Thin & Delicate is for fine, colour-treated, bleached, or damaged hair. Not sure? Take the 60-second quiz on our site for a personalised recommendation.
Is hair controller the same as keratin treatment?
No. A traditional keratin treatment coats the hair surface with a keratin-protein solution and typically lasts 8–12 weeks before washing out. A hair controller like QIQI restructures the internal bonds of the hair permanently. Results last up to 5 months, the formula is formaldehyde-free, and the effect does not gradually fade — it grows out naturally. Hair controller delivers longer, stronger results without the health risks associated with formaldehyde-based keratin treatments.
Free UK delivery over £80
Take control of your hair.
QIQI Hair Controller. Formaldehyde-free. Up to 5 months per treatment. Professional results at home. Dispatched within 1–2 working days.