Sarah K Carnival Protein Treatment Kit 2500ml

Sarah K Carnival Protein Treatment Kit - 2500ml brings the complete Carnival progressive smoothing system together in full professional sizes: the clarifying prep shampoo, the Brazilian protein smoothing active and the Universal Neutralizing finish, 2500 ml of product in total. Formulated with collagen, lactic acid, amino acids and macadamia and suitable for all hair types, it is the full three-step service in salon volume, ready for back-to-back clients.

At a glance

What it is: the complete 3-step Carnival smoothing system in full professional sizes
The three steps: Clarifying Shampoo (prep), Brazilian Protein (smoothing active), Universal Neutralizing (finish)
Core action: preps, smooths and reduces volume, then rebalances pH and seals
Hero actives: collagen, lactic acid, amino acids, macadamia
Free from: formaldehyde
Suitable for: all hair types
Format: complete 3-step kit, 2500 ml total, professional use

Why the full three-step system

A progressive smoothing result is not one product but a sequence, and this kit gives you all three parts in full salon sizes. First the Clarifying Shampoo lifts residue and opens the cuticle so the treatment can work evenly. Then the Brazilian Protein active reduces volume and controls frizz while treating the fibre with macadamia, lactic acid, collagen and amino acids. Finally the Universal Neutralizing finish rebalances the hair's pH and rebuilds it with keratin and collagen, sealing in softness and shine. Used together, the three steps deliver a cleaner, more polished and longer-looking smoothing than any single step on its own - and because the formula is formaldehyde-free, the whole service works without it.

Key ingredients

Macadamia - rich, emollient nourishment that helps tame frizz and add slip.
Lactic acid - realigns and rebalances the fibre for a smoother, more aligned surface.
Collagen - supports softness and structure across the treatment and the finish.
Amino acids - replenish and help condition the hair during the service.
Keratin - in the neutralizing step, rebuilds and reinforces the fibre after smoothing.

What to expect

Expect noticeably reduced volume, controlled frizz and a smooth, glossy, sealed finish across the full service. Because the kit carries all three steps, hair is prepped, smoothed and then rebalanced and reconstructed, so it feels stronger and better conditioned than smoothing alone. The full professional sizes make this a salon-volume kit for multiple services or back-to-back clients, and it is suitable for all hair types, from wavy through to very curly, with processing scaled to the texture. This is a progressive smoothing service, not a permanent straightener, so results gradually soften with washing.

Who it is for

Professionals who want the complete Carnival system in full salon sizes.
Salons running the smoothing service regularly or back-to-back who need working volume.
All hair types, from wavy to very curly, with processing time scaled to the curl.
Coloured or highlighted hair, following a strand test on lightened sections.

Who it is not for

Anyone wanting a permanent, poker-straight result - this reduces volume and frizz rather than permanently straightening.
Shoppers who need a fully vegan formula, as it contains collagen, amino acids and keratin.
Those wanting a silicone-free product; the neutralizing step contains silicones.
Anyone wanting a small try or travel size - reach for the compact Carnival kit in 3x100ml instead.

Professional tip

Treat the kit as one continuous service and do not skip the prep or the finish - the Clarifying Shampoo is what lets the active grip evenly, and the Universal Neutralizing step is what balances pH and seals the result. Work in fine sections throughout, keep the active off the scalp, and run a strand test first so you know exactly how the hair responds and how many flat-iron passes it needs before you commit to the full head.

How to use

Step 1 - Clarifying Shampoo. Apply to wet hair, massage through from roots to ends and rinse. Repeat if needed until the hair feels clean, then towel-dry to remove excess water.
Step 2 - Carnival Brazilian Protein. Apply strand by strand, staying about 1 cm off the roots. Leave to act for 45 minutes, rinse thoroughly, then dry the hair 100% and flat-iron in very thin sections.
Step 3 - Universal Neutralizing. Apply to damp hair, covering all the strands, and leave for 5 to 15 minutes. Rinse with water only, then flat-iron in fine sections, 8 to 12 passes, focusing more on the roots and less on the ends. Let the hair cool before styling.

Safety: For professional use. Keep out of reach of children, and avoid contact with eyes, mouth and mucous membranes. Protect from light, excessive heat and humidity. Carry out a strand and patch test before the service, and discontinue use if any sensitivity occurs. Follow the precautions printed on each bottle.

Using it within the Carnival system

This kit is the complete Carnival service in full salon sizes. The same system is also available as a compact Sarah K Carnival Protein Treatment Kit - 3x100ml as a try or travel size, and each step can be bought individually: Sarah K Clarifying Shampoo with Micellar Water - 1000ml for the prep, Sarah K Carnival Brazilian Protein Treatment - 1000ml for the smoothing active, and Sarah K Carnival Universal Neutralizing - 500ml for the finish. Between services, the Carnival home-care shampoo and conditioner help keep the result looking its best.

In short

The complete 3-step Carnival smoothing system in full professional sizes, 2500 ml total.
Clarifying prep, Brazilian protein smoothing active and Universal Neutralizing finish.
Formaldehyde-free, with collagen, lactic acid, amino acids and macadamia; suitable for all hair types.
Salon volume for multiple services; progressive, natural-looking result, not a permanent straightener.

The Carnival system by the step, plus home care

Sarah K Clarifying Shampoo with Micellar Water - 1000ml -- Step 1 prep that clears residue and readies the hair
Sarah K Carnival Brazilian Protein Treatment - 1000ml -- Step 2 smoothing active
Sarah K Carnival Universal Neutralizing - 500ml -- Step 3 pH-balancing, reconstructing finish
Sarah K Carnival Shampoo - 500ml -- home care that keeps the smoothing looking its best
Sarah K Carnival Conditioner - 500ml -- home care that keeps hair soft and manageable

Frequently asked questions

What is in the kit and what are the three steps?

The kit holds the complete Carnival smoothing system in full professional sizes, 2500 ml in total. Step 1 is the Clarifying Shampoo, which lifts residue and preps the hair. Step 2 is the Brazilian Protein active, which reduces volume and controls frizz while treating the fibre. Step 3 is the Universal Neutralizing finish, which rebalances pH and rebuilds the hair to seal in shine.

How do I use the full three-step kit?

Wash with the Clarifying Shampoo and towel-dry. Apply the Brazilian Protein strand by strand off the roots, leave 45 minutes, rinse, dry fully and flat-iron in thin sections. Then apply the Universal Neutralizing to damp hair for 5 to 15 minutes, rinse with water only and flat-iron 8 to 12 passes, focusing on the roots. Let the hair cool.

Does the kit contain formaldehyde?

No. The Carnival smoothing system is 'formaldehyde-free', and the Brazilian protein active carries a 0% formaldehyde claim on its label. The whole three-step service is built to smooth without it. As with any professional smoothing service, work in a well-ventilated space and follow the usage and precaution steps on each bottle for the best and safest results.

Can I use it on coloured, highlighted or bleached hair?

Yes, the system can be used on coloured, highlighted and bleached hair, and lightened hair often looks smoother and glossier afterwards. Because bleached or fragile sections are more delicate, always carry out a strand test first and adjust processing and flat-iron passes to the condition of the hair. If a fresh colour is planned, it is generally best to colour about two weeks after the service.

How long do the results last?

This is a progressive smoothing service, so the effect is strongest right after the treatment and softens gradually with each wash rather than stopping on a fixed date. How long it holds depends on your hair type, how often you wash, whether you colour or bleach, and your home care. Washing less often and using a gentle, sulfate-free shampoo helps the smoothness last longer.

How many services does this kit cover?

In full professional sizes, the kit is a salon-volume format suited to multiple services rather than a single use. Exactly how many it covers depends on hair length and thickness, since longer or very thick hair uses more product per service. For a smaller try, travel or single-service option, the same system is available as a compact 3x100ml kit.

Is the neutralizing step a toner?

No. Here 'neutralizing' means rebalancing the hair's pH after the acid smoothing step, not toning or cancelling brassy tones. The step contains no toning pigment and will not change your colour. If your goal is to counter yellow or brassy tones, you would use a dedicated toning product instead; this is a pH and reconstruction step that seals the service.

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