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Keratin Alpha Sleek Smooth Transformer

Keratin Alpha Sleek Smooth Transformer is rated 4.5 out of 5 by 79.
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6.76 oz.
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What It Is

A professional-grade, semi-permanent smoothing treatment mask that transforms hair for up two weeks of unparalleled smoothness, shine, and frizz control.

What It Does

• Smooths and controls frizz for up to 2 weeks.*

• 6x smoother hair**

• 77% more shine***

• Long-lasting frizz & volume control

• Faster smooth styling****

• Suitable for all hair types, even color or keratin-treated

 

*after 4 weekly uses of Smooth Transformer

**Smooth Transformer vs. before application

***vs. unwashed hair

**** vs. non-conditioning shampoo when using flat iron

What Else You Need to Know

This professional smoothing treatment is formulated with Keratin-Alpha Shaper and amino-acid chains to deliver salon-quality results. This is a breakthrough hybrid of texture and hair care. Contrary to classic conditioners or masks, it deeply penetrates inside the fiber and smoothes the hair at the keratin alpha level, the deepest level of hair. It is free from alcohol and artificial colorants, and suitable for all hair types including keratin-and color-treated. It is safe to use during a color appointment.

 

Note: This product has a technical smell due to a small amount of cysteine in the formula, which supports the anti-frizz, smoothing benefit.

1. Progessive treatment, use once a week after shampooing. Alternate with a hair mask on other wash days.

2. Shake the bottle well before use.

3. Section hair into two parts and apply evenly from lengths to ends on each section. Use 1 - 1.75 ounces, depending on hair thickness and length.

4. Leave on for 10–15 minutes, and then rinse thoroughly.

5. To activate the smoothing technology, blow-dry completely and use a flat iron. Use weekly for 4 uses, then once a month to sustain the frizz-control. Stop using if the hair feels dry.

AQUA / WATER / EAU • CETEARYL ALCOHOL • COCOS NUCIFERA OIL / COCONUT OIL • BEHENTRIMONIUM CHLORIDE • ISONONYL ISONONANOATE • CETYL ESTERS • PARFUM / FRAGRANCE • ETHANOLAMINE • ISOPROPYL ALCOHOL • CYSTEINE • DIMETHICONE • HYDROXYETHYLCELLULOSE • PHENOXYETHANOL • SODIUM METABISULFITE • AMODIMETHICONE • ASCORBIC ACID • TRIDECETH-10 • TRISODIUM ETHYLENEDIAMINE DISUCCINATE • PEG-100 STEARATE • ROSE KETONES • STEARETH-6 • TAURINE • TRIDECETH-3 • GLYCERIN • BUTYLENE GLYCOL • DISODIUM PHOSPHATE • ACETIC ACID • POLYSORBATE 60 • SODIUM PHOSPHATE • CARBOMER • SODIUM LACTATE • POLYSORBATE 20 • PALMITOYL TRIPEPTIDE-1 • PALMITOYL TETRAPEPTIDE-7

Purchases made in SalonCentric stores may be returned to any SalonCentric store. Purchases made through SalonCentric Customer Service, SalonCentric Business Partners, and SalonCentric.com orders Sold and Shipped by SalonCentric may be returned to a SalonCentric store; however, the return must not exceed $450 and must include the original receipt, packing slip, or invoice. For returns in-store of online orders, the refund will be credited back to the original payment method once the return has been processed. For SalonCentric.com Online Exclusive orders sold and shipped by third-party sellers, please see more details linked below for return steps.

The SalonCentric return policy does not currently apply to Kérastase & Shu Uemura purchases. Kérastase & Shu Uemura do not accept returns.

Click to see more details.

Rated 4 out of 5 by from effective The treatment is effective in helping smooth frizzy hair! It gave my hair some weight (which I love!) Unfortunately the smell is off-putting. When I had it on my client, it smelled similar to a relaxer or a perm. When I used it on myself, the smell of sulfur was too strong and I had to rinse it out prematurely.
Date published: 2026-09-30
Rated 5 out of 5 by from Recommend Love how immediately my hair felt softer and shiny, more importantly looked healthier.
Date published: 2026-09-22
Rated 4 out of 5 by from works well but the smell… Recently just purchased the product and i absolutely love it but… the smell. It smells like perm solution. The product works so well despite the smell. It also cut down my blowdrying time by half and significantly less frizz
Date published: 2026-09-18
Rated 3 out of 5 by from Smells bad The smell of this kind of has a urine smell. It does make the hair feel smooth though
Date published: 2026-09-01
Rated 5 out of 5 by from game changer This is one of those times when you can completely change hair for the better without changing the hair. Soft flowy and ridiculously impervious to even New York august humidity.
Date published: 2026-08-26
Rated 5 out of 5 by from I just love the Loreal Professional products. I just love the Loreal Professional products. I use this product personally and it does help with the humidity and frizz. My hair is definitely smoother. Looks and feels healthier. The downside is it does smell while doing the treatment.
Date published: 2026-08-14
Rated 4 out of 5 by from This line works great on textured hair but not recommended for finer or not textured hair. Smells very strong, for days!
Date published: 2026-08-13
Rated 5 out of 5 by from Try it! Honestly, when I applied it I felt a wave of panic, reminded me of perm solution. I left it in the reccomended time, then I rinsed it out and finished with a smoothing blowdry and iron. I was "WOWED" hair was fantastic, had movement, no frizz. and stayed straight!
Date published: 2026-08-09
  • y_2026, m_10, d_8, h_12
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  • loc_en_US, sid_loreal-professionnel-keratin-alpha-sleek-smooth-transformer, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
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  • CLOUD, getReviews, 7ms
  • reviews, product