A weekly salon-style treatment for two weeks of smooth, sleek hair
L'Oréal Professionnel Série Expert Keratin Alpha Sleek Smoothing Treatment is a weekly smoothing treatment for unruly, frizz-prone hair. Keratin Alpha Shaper, amino-acid chains and patented Fibersoft technology smooth the fibre for up to two weeks of softness and controlled volume.
How it works
A creamy treatment left on for 10 to 15 minutes, then activated by blow-drying and straightening.
Who it suits
- Frizzy, unruly or puffy hair
- Humid climates
- People who straighten their hair
Worth knowing before you buy: Results build up: best after about four weekly uses.
Complete the routine

SteamPod Smoothing Care
Heat protection before straightening.
Shop →
Liss Unlimited Shampoo
A smoothing shampoo for everyday washes.
Shop →Characteristics
- Texture: cream
- Hair type: frizzy, unruly hair
- Concerns: frizz, volume, dullness
- When to apply: once a week, after shampoo
- Main benefits: up to 2 weeks of smoothness and softness, controlled volume, more shine, faster styling
How to use
Shake well. After shampoo, divide hair into two sections and apply 30 to 50ml evenly from lengths to ends. Leave on for 10 to 15 minutes, then rinse. Blow-dry completely and straighten to activate. Use once a week; rinse eyes immediately in case of contact.
Active ingredients
- Keratin Alpha Shaper and amino-acid chains: progressively smooth the hair fibre
- Fibersoft technology: patented smoothing technology for long-lasting softness
Ingredients
AQUA / WATER / EAU · CETEARYL ALCOHOL · COCOS NUCIFERA OIL / COCONUT OIL · BEHENTRIMONIUM CHLORIDE · ISONONYL ISONONANOATE · CETYL ESTERS · PARFUM / FRAGRANCE · ETHANOLAMINE · ISOPROPYL ALCOHOL · CYSTEINE · DIMETHICONE · HYDROXYETHYLCELLULOSE · PHENOXYETHANOL · SODIUM METABISULFITE · AMODIMETHICONE · ASCORBIC ACID · TRIDECETH-10 · TRISODIUM ETHYLENEDIAMINE DISUCCINATE · PEG-100 STEARATE · ROSE KETONES · STEARETH-6 · TAURINE · TRIDECETH-3 · GLYCERIN · BUTYLENE GLYCOL · DISODIUM PHOSPHATE · ACETIC ACID · POLYSORBATE 60 · SODIUM PHOSPHATE · CARBOMER · SODIUM LACTATE · POLYSORBATE 20 · PALMITOYL TRIPEPTIDE-1 · PALMITOYL TETRAPEPTIDE-7 (F.I.L. N70068431/1)
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: 3474637335533
