L'Oréal Professionnel Keratin Alpha Sleek Frizz-Control Serum 50ml

The L'Oréal Professionnel Keratin Alpha Sleek Frizz-Control Serum 50ml is a professional serum with 5% Keratin Sealer, designed for those who want to durably eliminate frizz and protect their hair from heat during daily styling. Ideal for wavy, curly, or unruly hair that tends to swell in humidity.

Who it's for

This serum is the ideal solution for frizzy, unruly hair or hair prone to excessive volume. It works on natural, chemically treated, or frequently colored hair. If you use a hairdryer and straightener every day, the integrated heat protection is a tangible benefit that makes a difference in the long run.

Key Benefits

The Mirror Sleek Serum formula works on multiple levels:

• Frizz control for up to 72 hours, even in high humidity
• Heat protection up to 230°C for safe use with straighteners and hairdryers
• Mirror effect: smooth, shiny, and visibly sleek hair from the very first application
• Lightness: does not weigh down or make hair greasy, suitable even for fine hair
• Compatible with the complete Keratin Alpha Sleek routine for enhanced results

How to use

Apply a small amount of product to blow-dried hair or damp hair before heat styling. Distribute from mid-lengths to ends, avoiding the roots. No rinsing is required. For prolonged frizz control, pair it with the Keratin Alpha Sleek shampoo and the frizz-control mask from the line.

Active ingredients

The key active ingredient is 5% Keratin Sealer, a hydrolyzed keratin that seals the hair cuticle, reducing swelling caused by humidity. The formula also includes film-forming agents that create an invisible protective layer, responsible for the long-lasting smooth and shiny effect.

Recommended pairings

To get the most out of this serum, we recommend building a complete routine. Start with the disciplining shampoo, continue with the restructuring mask, and complete with the Smooth Transformer for a definitive style. You can also find the complete frizz-control routine already prepared.

Why buy from Planethair

Planethair has been online since 2000 and was one of the first Italian e-commerce sites specializing in professional hair products. All products are original, purchased directly from official distributors. Our team consists of haircare industry experts, available to advise you on the most suitable routine for your needs.

Frequently Asked Questions

Is this serum used on wet or dry hair?

It can be used on both: on damp hair before blow-drying for heat protection, or on already dry hair for an immediate smooth and frizz-free finish.

Is it suitable for fine hair?

Yes, the formula is lightweight and does not weigh hair down. Just use a small amount (1-2 pumps) to avoid a greasy effect.

How long does the frizz-control effect last?

The formula guarantees frizz control for up to 72 hours, even in humid environments. Results improve with continuous use of the complete line.

Can I use it every day?

Yes, it is formulated for daily use. It contains no aggressive ingredients and does not alter the hair's structure over time.