L’Oréal Professionnel Keratin Alpha Sleek Mirror Sleek Serum 50mL

L’Oréal Professionnel Keratin Alpha Sleek Mirror Sleek Serum 50mL

Complete your Keratin Alpha Sleek smoothing routine with the Mirror Sleek Serum — a heat-activated leave-in serum designed to deliver long-lasting smoothness, frizz and volume control while protecting hair during heat styling.

Formulated with 5% Keratin Sealer, the serum helps seal the hair's keratin structure for smoother, more manageable hair and instant shine. It also provides heat protection up to 230°C and helps protect against humidity. 

When used as part of the complete Keratin Alpha Sleek routine, L’Oréal reports progressive smoothing benefits, with the full Shampoo + Smooth Transformer + Serum routine providing up to 2 weeks of smoothness, frizz and volume control after four applications, under its testing conditions.

Benefits

• Helps smooth and control frizz
• Helps control unwanted volume
• Provides instant shine
• Heat protection up to 230°C
• Anti-humidity protection up to 80% humidity
• Heat-activated formula
• Leave-in — no rinsing required
• Suitable for all hair types
• Part of the complete Keratin Alpha Sleek smoothing routine

How to use

1. Shake well before use.
2. Apply to washed, towel-dried and detangled hair.
3. Divide the hair into sections.
4. Spray the product into your hands — start with approximately 2–4 sprays for fine to medium hair or 6–8 sprays for thicker hair.
5. Rub your hands together and distribute evenly through the mid-lengths and ends.
6. Do not rinse.
7. Blow-dry the hair completely to activate the formula.
8. For longer-lasting smoothing results, follow with a straightening iron.

Where does the serum fit in the Alpha Sleek routine?

Weekly treatment routine:
Shampoo → Progressive Treatment/Smooth Transformer → Mirror Sleek Serum → Heat styling.

Size: 50mL
Hair Type: All Hair Types
Product Type: Leave-In Smoothing Serum