Is the Keratin Alpha Sleek Smooth Transformer suitable for my hair type, especially if it's thick, frizzy, or chemically treated?

Absolutely! The Alpha Keratin Transformer by L'Oréal Professionnel is specially formulated for frizzy, dry, thick, or chemically treated hair. Its professional-grade formula is also safe for all hair types and textures, making it perfect whether your hair is straight, wavy, curly, or color-treated. With regular use, you'll notice significantly smoother, shinier, and easier-to-manage hair, no matter your hair's starting condition.

How soon can I expect to see results, and how long will the smoothing and anti-frizz effects last?

You'll notice your hair is up to 5x smoother and enjoys 2x less frizz after just the first use of the Keratin Alpha Sleek Smooth Transformer. Thanks to its intensive keratin-infused formula, the results can last up to two weeks with proper aftercare—including blow-drying and flat ironing to activate the treatment's full benefits. Plus, the effects are progressive—hair becomes even sleeker and shinier with each weekly application, especially when alternated with a professional mask on other wash days.

What’s the best way to use the Alpha Keratin Transformer for maximum results?

For the best results, use the Alpha Keratin Transformer once a week after shampooing your hair. Section your hair and apply the product evenly, then let it sit for 10–15 minutes before rinsing thoroughly. To lock in the smoothing and shine, make sure to blow-dry and flat iron your hair as these steps activate the treatment. On other wash days, alternating with a professional mask helps maintain hair health and enhances the smoothing effect. Stick to this routine, and you’ll see your hair become more manageable and radiant, week after week.

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L'Oréal Professionnel

Keratin Alpha Sleek Smooth Transformer 200ml – Professional Anti-Frizz Smoothing Treatment

£19.30 ex.vat

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Experience next-level smoothness with the Alpha Keratin Transformer: Keratin Alpha Sleek Smooth Transformer 200ml by L'Oréal Professionnel.

This professional keratin smoothing treatment helps progressively refine frizzy, unruly hair.

With consistent use, hair looks sleeker, glossier, and more salon-perfect.

Designed for long-lasting results and easier day-to-day styling.

Key Benefits

Up to 5x smoother hair and 2x less frizz*

Up to 2 weeks frizz control with full routine

Reduces unwanted volume for easier styling

Cuts styling time by up to 50%

Delivers +77% instant shine

Progressive results – better with every use

Suitable for all hair types

Alcohol-free & artificial colourant-free formula

Why This Smoothing Treatment Works

Searching for the best keratin smoothing treatment in the UK?

This advanced formula supports smoother, more manageable hair over time.

It’s made to help reduce frizz and improve control in humid conditions.

It also helps soften the feel of hair for easier styling.

Expect a smoother finish that looks more polished and refined.

The sleek smooth transformer approach is designed for professional results at home.

Alpha Keratin Transformer Technology

Keratin-Alpha Shapers – restructure and smooth hair fibres
Amino Acid Chains – strengthen and reinforce hair
Progressive smoothing system – results improve with repeated use

After 4 uses, hair is visibly transformed with improved discipline, smoothness, and shine.

Use this transformer routinely for the best progressive effect.

How to Use

Use once weekly after shampoo

Shake well before use

Section hair and apply evenly from lengths to ends

Leave on for 10–15 minutes, then rinse

Blow-dry completely and use a flat iron to activate technology

Alternate with a professional mask on other wash days

For best results, keep your routine consistent week to week.

Proven Results

5x smoother hair*

2x less frizz*

+77% shine after one use*

73% of users achieved smoother hair than ever before

82% found hair quicker to style

*Based on instrumental and consumer testing

These results support the performance of this smoothing system.

Ideal For

Frizzy, dry, or unmanageable hair

Thick, coarse, or high-volume hair types

Chemically treated or keratin-treated hair

Anyone wanting long-lasting smooth, sleek hair

Product Details

Size: 200ml

Brand: L'Oréal Professionnel

Range: Serie Expert

Type: Professional Smoothing Treatment

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Keratin Alpha Sleek Smooth Transformer 200ml – Professional Anti-Frizz Smoothing Treatment