Shampoos after a Keratin Treatment Test Comparison – the 5 Best Shampoos after a Keratin Treatment

For many, silver shampoo is an integral part of their regular care routine when it comes to neutralizing unwanted yellow or orange tones in their hair. In the big test and test winner comparison, five silver shampoos are examined closely. The selection is based on effectiveness, ingredients, application, and value for money.
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31. August 2025
31. August 2025
#1
1. Test Winner: Kérastase Discipline Bain Fluidealiste Shampoo

1. Test Winner: Kérastase Discipline Bain Fluidealiste Shampoo

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Pros

  • Sulfate-free formula
  • Smooth texture
  • Long-lasting smoothing effect
  • Prevents dryness
  • Pleasant fragrance
  • Strengthens the hair fiber
  • Easy to comb through

Cons

  • Relatively high price
  • Not available in every drugstore

TEST WINNER

4.8 / 5

VERY GOOD

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Is this shampoo really completely sulfate-free?

Yes, it was specially developed for chemically treated hair and contains no sulfates that could damage the keratin seal.

How often should I use the shampoo?

For optimal results, it is recommended to use it two to three times a week.

Can I also use it if I haven’t had a keratin treatment?

Yes, the product is also suitable for unruly or frizzy hair, regardless of whether you’ve had a smoothing treatment.

Are there matching conditioners or masks for it?

Yes, the Kérastase Discipline series offers complementary care products such as conditioners and hair masks.

Is it also suitable for colored hair?

Absolutely, it not only protects the keratin structure but also helps to maintain the color intensity.

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Kérastase Discipline Bain Fluidealiste Shampoo

The perfect sulfate-free shampoo for permanently smooth, well-groomed, and frizz-free hair after keratin treatment.

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#2
L’Oréal Professionnel Série Expert Pro-Keratin Refill Shampoo

L’Oréal Professionnel Série Expert Pro-Keratin Refill Shampoo

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Pros

  • Pro-Keratin Complex – Strengthens the hair from within
  • Intensively nourishes without weighing hair down
  • Improves combability
  • Ideal for chemically treated hair
  • Protects against hair breakage
  • Mild on the scalp
  • Pleasantly creamy consistency

Cons

  • Not completely sulfate-free
  • Can weigh down very fine hair

4.5 / 5

GOOD

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#3
OGX Ever Straight Brazilian Keratin Smooth Shampoo

OGX Ever Straight Brazilian Keratin Smooth Shampoo

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Pros

  • Sulfate and paraben-free
  • With an exotic fragrance
  • Intensively nourishes with natural oils
  • Improves the structure of straight hair
  • Available in drugstores

Cons

  • Somewhat viscous in application
  • Not quite as long-lasting effect
  • Can be too rich for very oily scalps

4.3 / 5

GOOD

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#4
Pureology Hydrate Sheer Shampoo

Pureology Hydrate Sheer Shampoo

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Pros

  • 100% vegan and sulfate-free
  • Particularly light for fine hair
  • Antioxidant color protection
  • Fresh, invigorating fragrance
  • Very economical

Cons

  • Priced in the higher segment
  • Requires good distribution when washing
  • Some find the fragrance too intense

4.3 / 5

GOOD

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#5
Moroccanoil Smoothing Shampoo

Moroccanoil Smoothing Shampoo

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Pros

  • Enriched with argan oil and amino acids
  • Intensive smoothing and care
  • Gives natural shine
  • Visibly repairs hair structure
  • Rich formula with anti-frizz effect

Cons

  • Not suitable for very fine hair
  • Slightly higher dosage required
  • Only available through selected retailers

4.2 / 5

GOOD

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Important Criteria when Buying a Shampoo after Keratin Treatment

When buying a shampoo after a keratin treatment, there are some important criteria that you should definitely consider in order to maintain the result of your hair treatment for as long as possible. First and foremost is being sulfate-free – aggressive surfactants such as Sodium Lauryl Sulfate (SLS) can quickly wash the keratin layer out of the hair. The shampoo should also be salt-free (Sodium Chloride), as salt can roughen the hair structure. Also, pay attention to a low pH value, which closes the hair’s cuticle layer and adds shine. Moisturizing ingredients such as argan oil, aloe vera, or keratin itself support the care and strengthen the hair. Avoid products with alcohol or parabens, as they can further dry out the hair. Ideally, choose a specially labeled shampoo that has been developed for keratin-treated hair. This will keep your hair smooth, supple, and shiny – day after day.

Why Kérastase Discipline Bain Fluidealiste Shampoo is the Test Winner

The Kérastase Discipline Bain Fluidealiste is not our test winner without reason – because it combines all the important requirements for a shampoo for keratin-treated hair in a single product. The formula is completely sulfate-free and was specially developed for chemically treated, unruly hair. This ensures a particularly gentle but thorough cleansing without damaging the sensitive hair structure or the keratin seal.

A major advantage of this shampoo lies in its intensely smoothing effect: The hair feels noticeably smoother, straighter, and more controlled after just a few applications – without any frizz. At the same time, the shampoo protects the hair fiber from drying out and breakage. High-quality care ingredients strengthen the hair from the inside out, while the delicate, elegant fragrance makes the application a real feel-good experience.

Another plus: The shampoo noticeably facilitates combing and styling. Especially for longer hair, this is an advantage not to be underestimated, as hair breakage is reduced by pulling and tugging. The scalp is also not neglected – the mild texture is pleasantly skin-friendly and leaves a fresh, well-groomed feeling.

Last but not least, the product also impresses with its origin: Kérastase is one of the leading international brands in professional hair care. The products are based on intensive research, the highest quality ingredients, and many years of expertise. So, if you choose the Discipline Bain Fluidealiste, you are not only investing in a shampoo – but in long-lasting hair quality at salon level.

Buying Advice: how to Find the Right Shampoo after Keratin Treatment

The Kérastase Discipline Bain Fluidealiste is not available everywhere, which underlines its exclusivity and quality. The best way to buy the product is directly from your trusted hairdresser or through authorized specialist retailers. Online shops such as Flaconi, Douglas, or Lookfantastic are particularly popular, as they offer a wide selection of Kérastase products and regularly offer attractive deals or bundles.

For comprehensive care, it is recommended to choose the Discipline care set directly, which, in addition to the shampoo, also contains the matching conditioner and a deep-acting hair mask. In the set, you usually get the products cheaper than when buying them individually – and your hair benefits from a coordinated, holistic care routine.

When buying, be sure to pay attention to original products, as there are unfortunately also counterfeits in circulation, especially for high-quality branded products such as Kérastase. Trustworthy retailers and well-known shops offer you security here and usually also customer reviews for orientation.

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Kérastase Discipline Bain Fluidealiste Shampoo

The perfect sulfate-free shampoo for permanently smooth, well-groomed, and frizz-free hair after keratin treatment.

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