New [Keratin Alpha Sleek] Mirror Sleek Serum for long-lasting smoothness, frizz & volume control.

Reprograms hair for up to 2 weeks of frizz control¹. Anti-humidity up to 80%² and instant shine³. Heat protection up to 230°C⁴.

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Description

Keratin Alpha Sleek Mirror Sleek Serum by L'Oréal Professionnel, formulated with Keratin Sealer 5%. It seals the hair's keratin structure for long-lasting smoothness, frizz & volume control.


This Mirror Sleek Serum is heat-activated, delivering instant shine that lasts up to 5 days1. The serum helps fight against up to 80% humidity2, whilst offering heat protection up to 230°C (450°F)3.


1Instrumental test after 1 application of shampoo, mask & serum. 2Instrumental tests, with full routine after 4 uses of the Smooth Transformer. 3Instrumental tests.

Results & Benefits
  • Reprogram hair for up to 2 weeks of frizz control1.
  • Up to 5x smoother hair and 2x less frizz2.
  • Controls unwanted volume for daily styling in half the time2.
  • Adds softness and instant shine that lasts up to 5 days3.

1Consumer test on 68 participants, 1 application/week for 4 weeks. Based on 15-day break observation. 2Instrumental tests with 4 uses of the Shampoo + Smooth Transformer + Serum routine. 3Instrumental test after 1 application of shampoo, mask & serum.

Instruction of use
Shake before use. On washed and towel-dried hair, detangle and section hair into two parts. Spraying into your hand, start with 2-4 sprays for thin to medium hair and 6-8 sprays for thicker hair. Rub hands together and distribute product evenly from lengths to ends. Do not rinse. Heat-activated. Dry with dryer. Use straightening iron for longer-lasting results. In case of contact with eyes, rinse immediately and thoroughly.

Ingredients

DIMETHICONE • BIS-(MORPHOLINOMETHYL C1-4 DIALKOXYSILOXY) DIMETHICONE • BIS-CETEARYL AMODIMETHICONE • PARFUM / FRAGRANCE • LINALOOL • CITRONELLOL • GERANIOL 


This ingredients list is subject to change and depends on country location selling. Consumers should refer to the product packaging for the most relevant ingredients list. In case of problem, please contact the consumer care center.

Your questions and our answers on Keratin Alpha Sleek range.

What is Keratin Alpha?​

It is the primary protein that forms the very core structure of your hair, residing at the deepest level of the fiber. It is the building block that dictates each strand’s shape, strength, and elasticity.

Why does Keratin Alpha determine hair outer shape?​

Alpha-keratin is the fundamental structural protein that forms the hair. Its internal helical arrangement, along with the extensive network of bonds within the hair's cortex, dictates the strand's overall geometry, and ultimately determines if hair appears straight, wavy, or curly.​

What hair needs does this range address?​

The Keratin Alpha Sleek range has been formulated with stylists for all those who want to reduce frizz, improve smoothness, and keep hair straighter and softer, with results that last. In fact, whilst other at-home smoothing treatments only act on the surface of the hair for temporary results, KAS transforms hair at the Keratin Alpha level, for up to 2 weeks of frizz & volume control, ensuring daily styling in half the time1. It is suitable for all hair types.


1Instrumental tests with routine 4 times of Shampoo, Smooth Transformer and Serum.

 

Does Keratin Alpha Sleek range contain keratin?

Keratin is an animal-derived ingredient, also found in human hair. These products don’t contain keratin, but reprogram hair from deep inside the fiber at Keratin Alpha level, reshaping Keratin Alpha chains for up to 2 weeks of smooth, frizz-controlled hair1.


1Consumer test on 68 participants, 1 application/week for 4 weeks