L'Oréal Professionnel Keratin Alpha Sleek Mirror Sleek Serum
The finishing step your smooth hair routine has been waiting for. The Keratin Alpha Sleek Mirror Sleek Serum from L'Oréal Professionnel is formulated with Keratin Sealer 5% to lock in everything the routine delivers — sealing the hair's keratin structure for long-lasting smoothness, frizz control, and that coveted mirror-like shine. Heat-activated and humidity-resistant, it works with your blow dryer and flat iron to amplify and extend results wash after wash.
Key Benefits:
- Seals hair keratin for smooth, controlled results lasting up to 10 washes
- Anti-humidity protection in up to 80% humidity
- Heat protection up to 230°C / 450°F
- Cuts daily styling time in half
- Delivers brilliant, mirror-like shine
- Alcohol-free and artificial colorant-free
How to Use: Apply to damp or dry hair, then activate with a blow dryer. Use a straightening iron for longer-lasting smoothness. Best results achieved as part of the full Keratin Alpha Sleek routine — Shampoo, Smooth Transformer, and Serum — for up to 2 weeks of frizz-free, smooth hair.
Note: This serum contains Keratin Sealer, a synthetic keratin-mimicking ingredient. It does not contain animal-derived keratin.