Keratin Alpha Sleek Professional Hair Mask 500ml – Anti-Frizz Smoothing Treatment

Transform frizzy, unruly hair with the keratin alpha sleek mask 500ml by L'Oréal Professionnel.

This professional smoothing hair mask deeply hydrates and softens.

It helps control volume without sacrificing movement.

Enjoy lasting shine and reliable frizz control for a smoother finish.

Key Benefits

Reduces visible frizz after one use*

Provides up to 3x less unwanted volume*

Deep hydration for dry, frizzy hair

Leaves hair soft, smooth, and manageable

Instant shine lasting up to 5 days

Helps protect against breakage and damage

Reduces styling time by up to 50%

Alcohol-free & artificial colourant-free formula

Why the keratin alpha sleek mask 500ml works

Looking for a keratin mask for frizzy hair in the UK?

The keratin alpha sleek mask 500ml is designed for a smoother look from the first use.

It helps hydrate dry lengths and soften rough texture.

It also targets unwanted volume without weighing hair down.

Expect improved manageability and a sleeker finish over time.

Ideal for professional results at home or in the salon.

It supports hair that feels stressed or brittle between appointments.

Use it as a dependable step in a consistent smoothing routine.

Advanced Formula Technology

Keratin-Alpha Shapers – smooth and refine the hair fibre

Amino Acid Chains – reinforce strength and resilience

Rich, sensorial texture – deep conditioning with a luxurious feel

Designed to leave hair looking polished while helping reduce the look of frizz.

Great for hair that needs hydration, softness, and control in one step.

How to Use

After shampooing, apply evenly from mid-lengths to ends

Leave on for 5 minutes

Rinse thoroughly

For best results:

Use Smooth Transformer once weekly

Use this mask on other wash days

Use consistently to maintain smoothness, softness, and shine between washes.

Apply mainly to the lengths for a clean, lightweight finish.

Proven Results

Visible frizz reduction after 1 use*

Up to 3x less unwanted volume*

Smoother, shinier hair with continued use

Enhanced results when used with full routine

*Based on instrumental and consumer testing

Ideal For

Frizzy, dry, or coarse hair

Thick or high-volume hair types

Chemically treated or keratin-treated hair

Anyone wanting long-lasting smooth, manageable hair

A great fit if you want a sleeker finish with less time spent styling.

Useful when humidity makes hair harder to control and style.

Product Details

Size: 500ml (Salon Size)

Brand: L'Oréal Professionnel

Range: Serie Expert

Type: Professional Smoothing Hair Mask

For dry, coarse, or high-volume hair, this mask offers a dependable smoothing step.

This keratin mask is a practical choice for routine smoothing care.