Using a Keratin Treatment at Home: A How-to Guide.

Keratin treatments are everywhere these days, advertising their hair-smoothing benefits. Our experts have rounded up the top tips for exploring at-home keratin treatments and keratin hair routine innovations so you can tame your mane from the comforts of home, with results that last.

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7 min read
L'Oréal Professionnel Team
15-10-2026

Who can use at-home keratin treatments?

A keratin hair treatment at home can work for many different hair types, from straight to curly. Leading the way in haircare innovation, Keratin Alpha Sleek Smooth Transformer by L'Oréal Professionnel is suitable for all hair types, including colored hair. It is also safe to use on hair that has gone through a straightening treatment.

Keratin hair routine

Full at-home keratin treatment hair routines include washing, applying the product, and styling. Many keratin treatments come with a keratin shampoo and conditioner for maintenance.

Smoothing haircare innovations

The Keratin Alpha Sleek range by L'Oréal Professionnel has been formulated with stylists for all those who want to reduce frizz, improve smoothness, and keep hair straighter and softer, with results that last. In fact, while other at-home smoothing treatments only act on the surface of the hair for temporary result, the Keratin Alpha Sleek range transforms hair at Keratin Alpha level, for 2 weeks of smooth, frizz & volume control*, ensuring faster and easier daily styling. It is suitable for all hair types.

Keratin Alpha Sleek Smooth Transformer is a unique hybrid between haircare product and smoothing treatment, suitable for all hair types, even color-treated hair.

Tools & products you need

To use an at-home anti-frizz treatment such as Keratin Alpha Sleek Smooth Transformer, you'll need: towels, a comb and a blow dryer.

Step 1: Cleanse & prep

You'll first want to wash your hair with a shampoo, such as Keratin Alpha Sleek Professional Shampoo. Apply evenly on wet hair and lather until a rich foam is obtained & rinse.

Step 2: Apply section by section & rinse

Then, divide your hair into sections using a comb, and apply a palm-sized amount of the treatment evenly. After leaving the product in from 10 to 15 minutes, rinse thoroughly.

Step 3: Protect

Apply a heat protectant serum before styling, such as the Vitamino Color Spectrum Glass Shine Serum. Take 2-3 pumps for thin/medium & 6-8 pumps for thicker hair. Distribute product evenly.

Step 4: Blow-dry & Flat iron

To have the maximum impact from Smooth Transformer's technology, blow dry the hair and for optimal results, use an iron at 210°C.

Repeat

Keratin Alpha Sleek Smooth Transformer is a progressive at-home smoothing treatment. The more you use it, the smoother the results, with performance peaking after 4 applications. Weekly application will help maintain the smoothness and shine.

Optimal results are obtained using the whole range, developed with stylists to ensure the perfect routine for smooth and frizz-controlled hair.
Apply Keratin Alpha Sleek Smooth Transformer once a week for long lasting smoothness and frizz control, after Keratin Alpha Sleek Shampoo.
Apply Keratin Alpha Sleek Mask every other wash day of the week.

At-home keratin treatments, yes or no?

An at-home keratin hair treatment can provide smoothing benefits.
Consider talking to your salon professional about innovative at-home anti-frizz treatments, like Keratin Alpha Sleek by L'Oréal Professionnel.

Your questions and our answers on at-home keratin hair treatment.

What is an at-home keratin hair treatment?

An at-home keratin hair treatment is a chemical protein treatment acting on the surface of the hair designed to smooth the hair cuticle. Keratin Alpha Sleek Smooth Transformer is an innovative treatment and the first ever at-home anti-frizz treatment that transforms hair at the deepest keratin alpha level, giving long lasting results and preserving hair integrity.

What types of hair is an at-home keratin treatment suitable for?

A keratin hair treatment at home can be suitable for many different hair types, from straight to curly. Keratin hair routine innovations such as Keratin Alpha Sleek Smooth Transformer is suitable for all hair types, including colored hair. It is also safe to use on hair that has gone through a straightening treatment.

What are the steps of an at-home keratin hair treatment?

The basic steps of keratin hair treatment at home are: washing and sectioning the hair, applying the product, blow drying and for optimal results, straightening with a flat iron.

What is keratin alpha?

It is the primary protein that forms the very core structure of your hair, residing at the deepest level of the fiber.

How does keratin alpha determine the hair's shape?

It is the primary protein that forms the very core structure of your hair, residing at the deepest level of the fiber. Alpha-keratin is the fundamental structural protein that forms the hair. Its internal helical arrangement, along with the extensive network of bonds within the hair's cortex, dictates the strand's overall shape, and ultimately determines if hair appears straight, wavy, or curly.

Does Keratin Alpha Sleek range contain keratin?

Keratin is an animal-derived ingredient, also found in human hair. These products don't contain keratin, but reprogram hair from deep inside the fiber at Keratin Alpha level, reshaping Keratin Alpha chains for 2 weeks of smooth, frizz-controlled hair.

Keep your hair salon-perfect at home with our Keratin Alpha Sleek pro routine.

Step 1: Cleanse

Sulfate-free Shampoo.

Cleanses and reinforces hair keratin.
Step 2.a : Anti-frizz

Smoothing treatment.

​Progressively smoothes hair for long-lasting frizz & volume control. Apply once a week for long lasting results.
Step 2.b : Moisturize

Mask.

On wash days that you do not use Smooth Transformer, apply the mask to deeply nourish & add shine.
Step 3 : Smoothness

Glass shine serum.

A patented leave in serum that delivers instant glass shine & lasting results up to 10 washes
Step 4 : Heat Activation

Airlight Pro or Steampod.

Blow dry or flatiron to activate the formula.

Anti-frizz routine