A purple bottle of L'Oréal Professionnel Keratin Alpha Sleek shampoo with water splashing around it.

This Week’s Hair Hero…

L'Oréal Professionnel Keratin Alpha Sleek Range

The L'Oréal Professionnel Keratin Alpha Sleek Range is an advanced smoothing haircare routine designed to tame frizz, reduce unwanted volume and leave hair feeling silky smooth with a mirror-like shine.

Powered by Alpha-Silane Technology, this innovative range creates a protective layer around each hair fibre to help control humidity, improve manageability and deliver long-lasting smoothness. Perfect for those with frizzy, unruly or hard-to-manage hair, the Keratin Alpha Sleek collection helps you achieve salon-smooth results at home.

What’s Included in the range?

Keratin Alpha Sleek Shampoo (300ml)
A sulphate-free shampoo that gently cleanses while helping to smooth the hair fibre, reduce frizz and prepare the hair for long-lasting sleek results.

Keratin Alpha Sleek Mask (250ml)
An intensely nourishing treatment that deeply hydrates and smooths the hair, leaving it feeling soft, manageable and protected against humidity.

Keratin Alpha Sleek Smoothing Cream (100ml)
A leave-in treatment that helps control frizz, improves manageability and protects the hair during styling for a sleek, polished finish.

Keratin Alpha Sleek Mirror Serum (50ml)
The perfect finishing product, delivering exceptional shine, smoothness and heat protection up to 230°C, while helping to keep hair sleek and glossy throughout the day.

Collection of hair care products including shampoo, mask, serum, and sealer in purple containers with black caps, set against a black background with purple and pink abstract swirling design.
A promotional image for Keratin Alpha Sleek hair treatment. Features a woman with long, straight, black hair sitting with her back facing the camera. The background displays a large bottle of the product splashing into water, emphasizing its effectiveness in hair styling. Text highlights the product's benefits, including being sulfate-free, fast-acting, and lasting up to five days.
A jar of keratin alpha sleek hair treatment with water splashing around it, against a white background.

Why Choose the Keratin Alpha Sleek Range?

The Keratin Alpha Sleek range is ideal for anyone looking to achieve smoother, shinier and more manageable hair without compromising on softness or movement.

Unlike traditional smoothing products, the Alpha-Silane Technology helps create long-lasting humidity protection while maintaining a lightweight, natural feel.

It is ideal for:

  • Frizzy or unruly hair

  • Hair affected by humidity

  • Thick, coarse or difficult-to-manage hair

  • Clients wanting smoother, shinier hair with less styling time

  • Anyone looking for long-lasting frizz control and salon-quality results at home

With continued use, the Keratin Alpha Sleek routine helps leave hair smoother, softer, shinier and easier to style, while reducing frizz and protecting against humidity.

Ask your Haringtons stylist which Keratin Alpha Sleek products are best suited to your hair at your next visit.

Hair Products at Haringtons

Discover our haircare heroes - the must have professional products for healthy shiny hair.

Each product is picked by Haringtons stylists to give you salon quality results at home.

Why Our Stylist Top Picks Matter

Our stylists select only the best products to keep your hair healthy, strong, and salon-perfect at home. Each pick is tried, tested, and recommended based on professional expertise and real results.

Close-up of a young woman with long blonde hair, wearing a brown button-up shirt, smiling against a black background.

Lilli’s Favourite Hair Product

Style Director / Senior Technician

(Wendover Salon)

Lilli Loves:

L'Oréal Professionnel Tecni.ART Flex Pli Thermo Modelling, Volumising Hair Styling Spray

A heat-activated spray that delivers shape and root lift, creating long-lasting body and bounce

“I love using Flex pli to create long lasting bouncy blowdrys!”

A clear spray bottle with a black trigger, labeled 'L'Oreal Professionnel Paris' and 'Flex Pli,' containing a professional thermos-modelling shape memory spray.
Portrait of a young woman with long blonde hair, wearing a black top, standing near a window with gray curtains in a well-lit room.

Becca’s Favourite Hair Products

Creative Technician

(Marlow Salon)

Becca Loves:

Gloss Absolu Anti-frizz glaze milk all-in-1 spray

Anti-Frizz Glaze Milk By Kérastase is an all-in-1 smoothing spray for hair prone to frizz. It's specially enriched with with Hyaluronic Acid, Glycolic Acid and Wild Rose in Oil and delivers dreamy, bouncy, glossy hair.

“The gloss spray makes the hair smell great and helps to keep hair feeling soft and frizz free.”

Browse our online shop for professional haircare products used by our expert stylists. All products are also stocked in-store at our Haringtons salons, where our team can offer personalised advice to suit your hair type and needs.