A smoothing mask that tames frizz and adds shine in five minutes
L'Oréal Professionnel Série Expert Keratin Alpha Sleek Mask is a nourishing mask for frizzy, unruly hair. A keratin-alpha shaper with amino chains helps smooth the hair, and shea butter softens it for shinier, more manageable lengths.
The texture
A rich, creamy mask that rinses out without weighing hair down.
Who it suits
- Frizzy or puffy hair
- Hair that frizzes in humid weather
- All hair types
Worth knowing before you buy: It contains fragrance and a small amount of isopropyl alcohol.
Complete the routine

Keratin Alpha Sleek Shampoo
The matching shampoo to use before the mask.
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Keratin Alpha Sleek Serum
A finishing serum for sleek, glossy ends.
Shop →Characteristics
- Texture: creamy mask
- Hair type: all hair types, especially frizzy and unruly hair
- Concerns: frizz, volume, dullness
- When to apply: after shampooing
- Main benefits: nourishes, smooths, controls frizz, adds shine
How to use
After shampooing, apply evenly from mid-lengths to ends. Leave on for 5 minutes, then rinse thoroughly. Use regularly, or alternate with the Keratin Alpha Sleek Smooth Transformer once a week. Avoid contact with the eyes.
Active ingredients
- Keratin-alpha shaper and amino chains (glycine, taurine): help smooth the hair keratin
- Shea butter: nourishes and softens
- Amodimethicone and aminopropyl dimethicone: add shine and help control frizz
- Palmitoyl peptides: hair-conditioning care
Ingredients
AQUA / WATER / EAU · CETEARYL ALCOHOL · BEHENTRIMONIUM CHLORIDE · CITRIC ACID · CETYL ESTERS · GLYCERIN · GLYCINE · ISOPROPYL ALCOHOL · AMINOPROPYL DIMETHICONE · POTASSIUM HYDROXIDE · ISODODECANE · PHENOXYETHANOL · BIS(C13-15 ALKOXY) PG-AMODIMETHICONE · BUTYROSPERMUM PARKII BUTTER / SHEA BUTTER · STEARETH-100 · PROPYLENE GLYCOL · HYDROXYPROPYL GUAR · PEG-150/DECYL ALCOHOL/SMDI COPOLYMER · TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES · POLYQUATERNIUM-37 · LINALYL ACETATE · PROPYLENE GLYCOL DICAPRYLATE/DICAPRATE · CHLORHEXIDINE DIGLUCONATE · CARVONE · CITRUS LIMON PEEL OIL · LIMONENE · COUMARIN · LINALOOL · CITRUS AURANTIUM BERGAMIA PEEL OIL · BUTYLENE GLYCOL · PPG-1 TRIDECETH-6 · PINENE · ACRYLATES/STEARYL METHACRYLATE COPOLYMER · SORBITAN OLEATE · CARBOMER · SODIUM LACTATE · TAURINE · POLYSORBATE 20 · EDTA · PALMITOYL TRIPEPTIDE-1 · PALMITOYL TETRAPEPTIDE-7 · PARFUM / FRAGRANCE
Formulations are updated by the manufacturer from time to time. Always check the packaging you receive.
Manufacturer information
Brand: L'Oréal Professionnel
Address: 14 rue Royale, 75008 Paris, France
EAN: 3474637335694
