L'Oréal Professionnel

Keratin Alpha Sleek Anti-Frizz Hair Serum for Hair Shine

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$30.40 $38.00

What it is: A heat-activated leave-in serum that seals the hair’s structure for up to 10 washes of smoothness, frizz control, and humidity protection.

SKU Code: P522562:2980316
Model: P522562:2980316
Source: Sephora
Brand: L'Oréal Professionnel
Categories: Hair&Bath&Body, Treatments, Hair Serums

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L'Oréal Professionnel

What it is: A heat-activated leave-in serum that seals the hair’s structure for up to 10 washes of smoothness, frizz control, and humidity protection.

Hair Texture: Straight, Wavy, Curly, and Coily

Hair Type: Fine, Medium, and Thick

Hair Concerns:
- Frizz
- Shine
- Volumizing

Key Benefits:
- Provides long-lasting smoothness and controls frizz
- Protects against heat and humidity
- Repels water and delivers mirror sleek shine

Highlighted Ingredients:
- Keratin Sealer 5%: Powerful complex that seals the hair’s keratin structure for smooth results.

Ingredient Callouts: It is vegan.

What Else You Need to Know: This professional leave-in serum is your key to long-lasting, salon-quality smoothness. It is free from alcohol and artificial colorants and suitable for all hair types.

Fragrance Description: A fresh and modern floral fragrance with powdery notes of cardamom and ginger, balanced by a warm, musky base of sandalwood and vetiver.

Clinical Results: In an instrumental test:
- Provided frizz and volume control for up to 10 washes
- Protected against humidity up to 80%
- Protected against heat up to 450°F

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Images from reviews

Verified Purchase

2w ago

Recommended

Frizzy hair routine must have

Easiest 5 stars I’ve ever given a product! My hair is so shiny and smooth even after washing (product is supposed to last 10 washes). If you’re constantly fighting frizz like I am then I highly recommend that you try this serum.

adlz

4w ago

Recommended

Helps with frizz

I've been using the L'Oréal Professionnel Keratin Alpha Sleek Anti-Frizz Hair Serum, and it does a great job controlling frizz and adding a nice, healthy shine. My hair feels softer, smoother, and much easier to style without feeling greasy. The only downside for me is the scent—I personally didn't like it and found it a bit unpleasant. Even so, the results on my hair were good enough that I'd still consider using it.

cherriebomb21

Incentivized

1mo ago

Recommended

Just a Scoch

I received the Keratin Hair Serum for Shine to test out and overall I really like it! It definitely adds shine and helps smooth down my flyaways without making my hair feel crunchy or stiff. That said, a little goes a LONG way with this stuff. The first time I used it I was a little heavy handed and my hair ended up looking way more greasy than shiny 😂. After figuring out the right amount, though, I loved the results. Just a small pump worked great on my hair and left it looking smooth, healthy, and glossy. If you use it sparingly, it’s a great finishing product and makes your hair look like you just left the salon.

AbbyMinne

Incentivized

Verified Purchase

2mos ago

Recommended

Leaves the hair super soft and shiny. I got it specifically for a trip to the beach and the humidity, but I haven’t had the chance to test the anti-frizz.

btyaz

2mos ago

Recommended

This was probably my favorite product from the range. I’m usually careful with hair serums because my hair is on the thinner side and can look greasy fast, but this one felt really lightweight. I used 1-2 pumps on damp hair mainly through the mid-lengths and ends and it helped a lot with frizz and flyaways without weighing my hair down. My waves looked smoother and shinier, especially after blow drying. It also gave that soft “fresh salon hair” finish without making my hair feel coated or sticky. A little definitely goes a long way

srilee

Incentivized

2mos ago

Recommended

Stinks

Great product. Smells absolutely terrible. Like burnt hair.

Jenergizer

Verified Purchase

2mos ago

Recommended

So soft

After using this product for the past few weeks I can honestly say I love it! It makes my hair feel so soft and it smooths out all the fly aways! I would definitely repurchase this.

janay18

Verified Purchase

2mos ago

Good product; awful smell

My hairdresser used this product on me and I purchased from Sephora. The smell is awful. Didn’t notice it as much in the salon. Good product; awful smell.

Nanne13

3mos ago

Recommended

smells funky

The cere is good. The only thing I would change is the smell. Mine had like a fishy kind of smell, which did not like at all. I was scared to even put it on when I was going to go out, but I did try it without going out and styling it and it was amazing just that the smell was not my favorite.

Hazeleyez408

Incentivized

3mos ago

Recommended

Love it

I love using this serum after I straighten my hair, it looks amazing my hair has never looked so shiny before, my hair feels silky and soft!

Jilliancarissa

Incentivized

-Keratin Sealer 5%: Powerful complex that seals the hair's keratin structure for smooth results.

Dimethicone, Bis-(Morpholinomethyl C1-4 Dialkoxysiloxy) Dimethicone, Bis-Cetearyl Amodimethicone, Parfum/Fragrance, Linalool, Citronellol, Geraniol.

Suggested Usage:
-Shake well before use.
-On washed, towel-dried hair, section hair into two parts.
-Spray into your hand (start with two to four sprays for thin hair and six to eight for thick hair).
-Distribute evenly from lengths to ends. Do not rinse.
-This product is heat-activated. Blow-dry completely.
-For maximum long-lasting results, use a straightening iron after blow-drying.