L'Oréal Professionnel Paris KERATIN ALPHA SLEEK serum

Hair styling product - Heat protectant for hair

L'Oréal Professionnel Paris
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L'Oréal Professionnel's Alpha Sleek Keratin Mirror Serum, formulated with 5% Keratin Sealer, seals the hair's keratin structure for lasting smoothness and frizz and volume control for up to 10 washes*. It controls frizz even in humidity up to 80%* and provides heat protection up to 230°C*.

Benefits:

Cut styling time in half**. Transform hair: smoothness and frizz control for up to 2 weeks when using the complete routine**. Heat activated. Blow dry. Use a flat iron for longer-lasting results.

This serum contains no artificial colors or alcohol.

Keratin is an ingredient of animal origin, also present in human hair. This product does not contain keratin.

*Instrumental tests

**Instrumental test with a routine of 4 applications of Shampoo + Smooth Transformer + Mirror Sleek Serum

How to use:
  1. Shake before use.
  2. Divide the detangled, washed and towel-dried hair into two sections.
  3. Spray into your hand. Start with 2-4 sprays for fine to medium hair and 6-8 sprays for thicker hair.
  4. Rub into your hands and distribute the product evenly from lengths to ends.
  5. Do not clarify.
  6. Heat activated. Blow dry. Use a flat iron for longer-lasting results.
EAN
3474637335618
Hair
All hair types
Textures
Serum
Format
Doser
ingredients
dimethicone, bis-(morpholinomethyl c1-4 dialkoxysiloxy) dimethicone, bis-cetearyl amodimethicone, parfum / fragrance, linalool, citronellol, geraniol (f.i.l. n70063363/1).

The ingredient lists for our products are updated regularly. Please refer to the ingredient list on the packaging before using the product.

Brand Safety Warning
For external use only. In case of contact with eyes, rinse with water and keep out of reach of children.
Legal information of the brand
L’Oréal Professionnel, 14, rue Royale, 75008, París
https://www.loreal.com/es-es/espana/
corpes.contacto.loreal@loreal.com

Assessment L'Oréal Professionnel Paris - KERATIN ALPHA SLEEK serum

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Reviews L'Oréal Professionnel Paris - KERATIN ALPHA SLEEK serum

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5 4 3 2 1
Age
Between 18 and 25 years old Between 26 and 35 years old Between 36 and 50 years old More than 50 years old
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Usage time
Not specified Less than 6 months Between 6 months and 1 year Between 1 and 3 years Between 3 and 5 years More than 5 years
Hair type
Oily Dry Damaged Curly Dyed hair Hair highlights Blonde Without Volume Weak hair Seborrheic Straight hair
Vanda
Verified purchase
20/10/2026
Median
I expected more... I have fine, slightly wavy hair that’s manageable. The straightening treatment isn’t surprising.
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Gender: ---
Age: ---
Country: PT
Has been using this product for: Less than 6 months
Hair type:
Oily, Hair highlights
Vanda does not recommend this product
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