28.10.2026

Keratin Treatment vs Brazilian Blowout: What's the Difference?

How can you make your hair smooth and beautiful? One of the quickest and easiest ways is with professional salon treatments. Among the most popular options are a keratin treatment and Brazilian Blowout. When comparing keratin treatment vs brazilian blowout, the results may look similar at first: the hair becomes smoother, more manageable and beautifully shiny. However, the formulas, the way they work and the extent to which they alter the hair’s natural texture are different.

So, when deciding which is better keratin treatment or brazilian blowout, it’s not enough to consider the final appearance alone. The condition of the hair before the treatment, how much smoothing is needed and how long you want the results to last are all important.
  • Brazilian Blowout is a specific professional smoothing system with its own formula and treatment process.
  • A keratin treatment is a broader term covering several smoothing techniques. Modern systems give the stylist more flexibility to adjust the intensity of the treatment and can provide a more noticeable and longer-lasting smoothing effect.
  • Next, we’ll look at both methods in more detail.

Keratin treatment vs Brazilian Blowout: key differences

  • The easiest way to explain the difference between keratin and brazilian blowout is with a comparison table. In short, keratin treatments offer a wider range of possibilities, depending on the particular formula used.
Keratin treatment Brazilian Blowout
Brazilian Blowout
How it works
It depends on the formula. Some treatments mainly smooth the cuticle, while others have a stronger effect on the hair structure. The result is sealed in using high heat.
The formula creates a protective protein layer around the hair and smooths the cuticle. The effect is also sealed in with heat.
Degree of smoothing
The main aim is to make the hair smoother and more manageable. A noticeable wave or some of the natural curl can be retained.
The main aim is to make the hair smoother and more manageable. A noticeable wave or some of the natural curl can be retained.
Curl and volume
With a more intensive treatment, the curl becomes noticeably weaker and the hair straighter. The degree of change depends on the formula and technique used.
Frizz can be reduced while retaining the wave, some of the curl and the hair’s natural volume.
Restrictions after the salon
This depends on the specific product. Some systems require a certain amount of time before the first wash or styling, while others have no such restrictions.
Brazilian Blowout: Brazilian Blowout Original is described as a zero downtime treatment: the hair can be washed, tied up and styled immediately after leaving the salon.
How long the results last
The results depend on the formula, the hair’s original condition and aftercare at home. They usually last for several months.
For Brazilian Blowout Original, the manufacturer states that the results last for around 8 to 12 weeks.
The main difference lies in how much the hair texture can be changed. Brazilian Blowout is suitable when the main aim is simply to reduce frizz. Different keratin systems provide different levels of smoothing, but they can also achieve a noticeably straighter and, depending on the formula, longer-lasting result. For very curly or porous hair, or when a more significant change in texture is desired, a keratin treatment is often the more suitable option.

What is a keratin treatment?

To understand whether keratin or brazilian blowout better, it’s important to look at how the result is achieved. The presence of keratin in a product alone doesn’t explain how the treatment works. The overall formula plays an important role and may contain hydrolysed proteins, amino acids, conditioning ingredients and smoothing agents whose action is enhanced by heat.
  • During the treatment, the stylist distributes the product through the lengths and then works through the hair with straighteners. Under high heat, the active ingredients work within the hair structure, while some of the formula is sealed onto the surface, smoothing the cuticle. As a result, frizz is reduced and curls become looser, leaving the hair smoother and straighter. How noticeable the effect depends on the product formula and the temperature used during the treatment.
The final result depends on both the formula and the technique. The hair may become simply smoother and more manageable or noticeably straighter. The amount of curl and volume retained near the roots varies between different systems. This is one of the advantages of keratin treatments: the stylist can choose the formula and intensity of the treatment according to the desired result.
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What is a Brazilian Blowout?

Continuing our comparison of which is better keratin treatment or brazilian Blowout let’s take a closer look at Brazilian Blowout Original. The principle behind this treatment is different. According to the manufacturer, a protective protein layer forms around the hair shaft during the treatment, helping to smooth the cuticle and reduce frizz. The three-step system (Ionic Cleanser, Original Smoothing Solution and Ionic Bonding Spray) is applied to the hair, with the result then sealed through blow-drying and straightening.

The main feature of the treatment is that it allows more of the hair’s natural texture to be retained. It is often chosen when the aim is to make the hair smoother and more manageable while keeping some wave, curl and natural volume. A straighter result can also be achieved, although keratin systems generally offer a wider range of more intensive straightening results.
  • Another feature of Brazilian Blowout Original is zero downtime. Once the treatment is complete, there is no need to wait several days: the hair can be washed, tied back or secured with hair clips straight away. The manufacturer states that the results can last up to 12 weeks with appropriate aftercare at home.
When choosing between brazilian blowout vs keratin, remember that Brazilian Blowout reduces frizz while allowing more of the natural texture to remain. If the aim is to noticeably loosen curls and achieve a longer-lasting, straighter result, a keratin treatment may be the more suitable option.
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Which treatment is best for your hair?

When choosing a treatment, the density, thickness, curl pattern and current condition of the hair should all be taken into account. Keratin systems offer more flexibility in adjusting the intensity of the treatment to suit a particular hair type and the desired result.
  • For curly or wavy hair

    When comparing keratin vs brazilian blowout for frizzy hair, the right choice depends on the result you want: whether you simply want to make the curls smoother and more manageable or achieve a much straighter finish.
  • To noticeably smooth the curls and reduce frizz, an appropriate keratin system is usually the preferred option.
  • Brazilian Blowout is better suited to those who don’t want to significantly change the hair’s natural shape.
Keratin can also be used for a softer result. However, on more defined curls, it can provide more noticeable straightening. The specific formula and treatment intensity are selected by the stylist according to the client’s desired result.
  • For fine or fragile hair

    The question of which is better, brazilian blowout or keratin for fine hair requires particular care. The aim here isn’t maximum straightening, but rather to smooth the hair without weighing it down or causing it to lose volume.
  • A keratin treatment can be suitable if a gentler system is used and the temperature is adjusted correctly. Frizz can be reduced and the lengths smoothed without necessarily creating a completely straight result.
  • Brazilian Blowout can be considered when the aim is to retain more natural volume while making only a subtle change to the hair’s texture.
Before treatment, the stylist should always assess fragility, the condition of any lightened areas and the overall density of the hair. If the lengths are significantly damaged, it may be better to postpone the treatment regardless of the method chosen.
  • For thick, coarse or frizzy hair

    Thick and coarse hair often requires more noticeable smoothing, particularly if it’ is very frizzy or has a strong curl pattern. In this case, the difference between the treatments becomes more apparent.
  • Keratin systems can provide stronger smoothing through the lengths, loosen curls and reduce excessive volume. For thick and porous hair, this is often the more suitable option.
  • Brazilian Blowout can be suitable when the main aim is to reduce frizz and make the hair more manageable while retaining some of its natural texture.
Remember that hair density and hair thickness are different characteristics. Fine hair can be very dense, while thick individual strands may grow less densely. A stylist takes these factors into account when selecting the formula and treatment intensity.

Are Keratin Straightening and Brazilian Blowout safe?

This depends on the specific formula used and how the stylist works with it. The key factors are:
  • the ingredients in the product being used;
  • the temperature of the straighteners;
  • the condition of the hair before the treatment;
  • following the correct treatment protocol and ensuring proper ventilation in the salon.
Some smoothing products may contain formaldehyde, methylene glycol or ingredients that can release formaldehyde when heated. That’s why it’s important to know not just the name of the treatment, but exactly which product will be used. A professional stylist assesses the formula and the condition of the hair and selects an appropriate treatment intensity.

Keratin systems offer more flexibility in this respect, as a gentler formula can be selected and the intensity of the treatment adjusted. Particular care is needed with bleached, fragile or already damaged hair, and in some cases, it may be better to postpone straightening altogether.

Can you get a keratin treatment after a brazilian blowout? Yes, but you need to consider how much time has passed, which products were used previously and the current condition of the hair. The treatments shouldn’t be layered without assessing the hair first.

Aftercare: how to make the results last longer

Home care affects how long the hair stays smooth and how evenly the effect fades. After a keratin straightening treatment, follow the recommendations for the specific formula used: some systems have restrictions during the first few days, while with others the hair can be washed almost immediately. Brazilian Blowout Original has no downtime, so there is no need to wait several days before the first wash.

An important point is combining straightening with hair colouring. With Brazilian Blowout Original, the manufacturer allows colour to be applied on the same day if it’s done before the smoothing treatment. If you plan to change your colour afterwards, it is recommended to wait two weeks. The rules vary between keratin systems, so it is best to check the recommended interval with the stylist who works with the specific product.

Ongoing aftercare is based on a few simple rules:
  • use a suitable shampoo and conditioner;
  • avoid overusing deep-cleansing products;
  • rinse the hair with fresh water after swimming in a pool or the sea;
  • take regular care of the lengths, especially if the hair is dry or lightened;
  • don’t repeat the smoothing treatment sooner than necessary.
How long does keratin treatment last vs brazilian blowout? Keratin treatments are often chosen partly for their longer-lasting results, with smoothness typically lasting for several months. For Brazilian Blowout Original, the manufacturer states that results can last up to 12 weeks. In both cases, longevity depends on the hair’s original condition, how often it is washed and the products used at home.

Keratin Straightening or Brazilian Blowout: which should you choose?

To sum up, which is better keratin treatment or brazilian blowout, depends on the result you want to achieve.

Experienced stylists follow a simple principle:
  • Want to smooth frizz while keeping some wave and volume? - Brazilian Blowout.
  • Want straighter, smoother and more manageable hair? - a keratin system.
Lightened, fragile or previously damaged hair requires particular care. In these cases, the stylist should first assess the condition of the hair and then decide whether the treatment is suitable and which formula should be used.

Overall, keratin straightening offers more flexibility when a more noticeable and longer-lasting result is desired.

FAQ

Is a Brazilian Blowout the same as a keratin treatment?

No. Brazilian Blowout is a separate professional system with its own formula and treatment protocol. Keratin treatment is a general term for different smoothing systems that can provide varying levels of change to the hair’s texture.


Which treatment is better for frizzy hair?

Both treatments can help reduce frizz. Brazilian Blowout is more suitable if you want to retain your natural wave or curl, while a keratin treatment can provide more noticeable smoothing and straightening.
  • Which treatment makes hair straighter?

    A straighter result can usually be achieved with a keratin system. The formula and intensity of the treatment can be selected to relax the curl more noticeably. Brazilian Blowout is more commonly used for smoothing without significantly changing the hair’s natural texture.
Can you get a Brazilian Blowout on colour-treated hair?

Yes. Brazilian Blowout Original can be used on colour-treated hair. The manufacturer also allows colouring on the same day as the treatment if the colour service is carried out before the smoothing treatment. If colouring is planned after a Brazilian Blowout, it’s recommended to wait two weeks.


Can you wash your hair immediately after a Brazilian Blowout?

Yes. Brazilian Blowout Original has zero downtime, so you can wash your hair, tie it up or style it immediately after the treatment. There’s no need to wait several days before the first wash.


How often can you get a keratin treatment?

A keratin treatment should only be repeated once the previous result has noticeably faded, usually after several months. The exact interval depends on the specific formula, the condition of your hair, how often you wash it and your home-care routine. It’s best to have the condition of your hair assessed by your stylist before repeating the treatment.
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