L'Oréal Professionnel Paris Keratin Alpha Sleek Hair Mask — 200ml Intensive Smoothing & Frizz Control

L'Oréal Professionnel Keratin Alpha Sleek Professional Hair Mask is an intensive salon-grade mask that deeply nourishes, smooths keratin fibers and tames frizz for instantly softer, shinier hair.

This rich, sensorial treatment from L'Oréal Professionnel targets the hair fiber to deliver hydration, manageability and visible smoothing. Designed as part of the Keratin Alpha Sleek routine, the mask combines Keratin-Alpha Shaper technology with amino-acid chains to reshape and fortify strands while reducing bulk and flyaways. It works on all hair types and can be used alone for immediate softness or alongside the Smooth Transformer for extended control.

How does this mask improve frizz and manageability?

The formula focuses on rebuilding the hair surface and aligning fibers to limit friction and humidity-induced swelling. With repeated use, hair looks sleeker and is easier to style because the mask makes each strand smoother and more cohesive.

• Keratin-Alpha Shaper plus amino-acid chains smooth the hair cuticle.
• Reduces frizz and volume for a sleeker silhouette.
• Creates a softer, more manageable texture that resists humidity.

What results can I expect after one treatment and with the full routine?

After the first application hair feels immediately softer, more hydrated and gains perceptible shine. When used as part of the Keratin Alpha Sleek regimen—alternating with the Smooth Transformer—results extend, offering controlled, smooth hair for up to two weeks between treatments.

• Instant softness and visible shine from the very first use.
• Noticeable reduction in frizz and bulk with continued application.
• Up to two weeks of enhanced smoothness when following the recommended routine.

Is the mask suitable for my hair type and color-treated hair?

The mask is formulated for universal use: fine, thick, curly, straight and chemically treated hair can benefit from its reconstructive and smoothing properties. The alcohol-free and artificial colorant-free composition makes it compatible with color-treated strands while delivering intensive care.

• Safe for all hair types, including colored and chemically treated hair.
• Alcohol-free to help prevent dryness and preserve hair color.
• Suitable for targeted repair on damaged sections or full-length application.

How should I use the Keratin Alpha Sleek Professional Hair Mask for best effects?

Apply to clean, towel-dried hair and leave on according to your hair’s needs before rinsing thoroughly. For extended smoothing, combine weekly use of the Smooth Transformer with mask applications on alternate wash days as part of the Keratin Alpha Sleek routine.

• Use on washed, towel-dried hair for even coverage.
• Leave on for the time indicated on the packaging, then rinse completely.
• Alternate mask days with the Smooth Transformer for longer-lasting sleekness.

Who is this for: This professional-strength mask is aimed at anyone seeking intense hydration, improved manageability and reduced frizz—from clients with naturally unruly hair to those who style frequently or have chemically processed strands. It’s a go-to for people wanting salon-level smoothing at home without aggressive ingredients, and for stylists who need a reliable finishing treatment in the chair.