Promotional price valid from 01/10/2026 to 31/10/2026.
Limited to existing stock.
L'Oréal Professionnel Série Expert Keratin Alpha Sleek Professional Mirror Sleek Serum 50ml controls frizz and smooths hair for up to 10 washes.
L'Oréal Professionnel Série Expert Keratin Alpha Sleek Professional Mirror Sleek Serum 50ml is a leave-in hair serum that delivers lasting smoothness and controlled frizz and volume. Its formula contains 5% of a Keratin Sealant, which, when activated by heat, seals the hair's keratin structure from within. In fact, it works at the level of Alpha-Keratin to reshape the fiber and target frizz and volume at the source. The result is smoothness and frizz control that lasts up to 10 washes when the complete routine is used. Beyond that, the formula controls frizz in up to 80% humidity, so results hold even in challenging conditions.
Furthermore, this serum provides thermal protection up to 230°C, and it reduces styling time by half. All in all, this serum delivers smooth, frizz-controlled results for softer, sleeker hair that stays that way.
Shake L'Oréal Professionnel Série Expert Keratin Alpha Sleek Professional Mirror Sleek Serum 50ml before use. Detangle damp (towel-dried) hair and divide it into two sections. Start with 2 to 4 pumps for fine to medium hair, or 6 to 8 pumps for thick hair. Warm the product between your hands and distribute it evenly from lengths to ends. Do not rinse. This product is heat-activated: blow-dry your hair and finish with a flat iron for longer-lasting results.