Frizz Control
Heat protection up to 230°C
Salon selected
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L'Oreal Professionnel · Keratin Alpha Sleek
Selected for Frizz Control
A heat-activated leave-in serum for smooth, glossy, frizz-controlled hair. Formulated with 5% Keratin Sealer, it controls unwanted volume, resists humidity and delivers long-lasting shine...
The product profile
Heat protection up to 230°C
Helps resist humidity up to 80%
Helps control frizz and unwanted volume
Inside the formula
Dimethicone, Bis-(Morpholinomethyl C1-4 Dialkoxysiloxy) Dimethicone, Bis-Cetearyl Amodimethicone, Parfum / Fragrance, Linalool, Citronellol, Geraniol. Despite the Keratin Alpha Sleek name, L'Oréal states that this product does not contain keratin. Ingredient lists can change; always check the product received.
Professional beauty ritual
The application ritual
Begin with the recommended amount on clean, prepared hair or skin.
Distribute evenly and follow the product-specific technique.
Finish with the complementary care selected for your concern.
The complete dossier
A heat-activated leave-in serum for smooth, glossy, frizz-controlled hair.
Formulated with 5% Keratin Sealer, it controls unwanted volume, resists humidity and delivers long-lasting shine while protecting hair during heat styling.
Despite the Keratin Alpha Sleek name, L'Oréal states that this product does not contain keratin. Store in a cool, dry place and lock the pump after use. Avoid contact with the eyes; if it occurs, rinse carefully with water.
How do I use Keratin Alpha Sleek Mirror Sleek Serum?
Apply the leave-in serum to washed, towel-dried hair from mid-lengths to ends, then blow-dry completely to activate the formula. Do not rinse.