Editor's TipEditor's Tip

To fortify and repair hair further, cleanse with Kérastase Bain Force Architecte.

Kérastase

Birchbox Breakdown

Heat styling and coloring our hair is a bit like eating a bag of Cheetos: We know we’ll need to work hard to counteract the effects later. This ultrahumectant hair masque fortifies weakened strands in 15 minutes or less. Think of it as a cardio circuit plus strength training session for your hair. Now, go wash the orange dust off your hands.

How it Works

A patented combination of fibrous strengtheners, molecular technology, and proteins repair weakened strands from within. Ceramides coat each piece of hair to combat external breakage and soothe the cuticle.

How to Use

Apply a quarter-sized dollop to hair from mid-lengths to ends. Leave on for 10-15 minutes and rinse thoroughly.

More for You!
  • Product orders $50+ and all monthly box brands ship free
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Bonus Shop

Product Reviews & Sample Feedback

4.8 out of 5 stars, based on 10 reviews 10 Reviews
4.8 out of 5 stars
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Age
17 & under
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25-34
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Most Helpful Customer Reviews

Best hair masque!

I have been searching for a masque like this for years! I can't tell you how silk and soft my hair feels after I use this! It adds shine to my hair while repairing split ends! After I use this product my hair is so soft I dont even have to use a detangler! AMAZING PRODUCT

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Amaze me.

I'm amazed every time. I notices dramatic results with this used with the shampoo of the same name. I have had much less breakage. It's a pretty penny, but...well, so are you!

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Masque Treatment

This brought my hair back to life! My hair was so dry and dead from this harsh winter, my next option was just to cut it. I used this once and my hair looked fresh, my ends weren't dry and it felt so soft and lucious. It is a little pricey but if you hair is in need of some serious love it is well worth the investment!!

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Great for damaged and dry hair

This mask is definitely a splurge, but if your hair is incredibly damaged and dry, it's so worth it. I recently had to cut off 2+ inches of split and damaged ends and my stylist recommended this to me to help keep the damage at bay while I continue to grow my hair. It's super thick and feels + smells awesome. I usually focus it on my ends and let them soak it up while I shower - it's also awesome as an overnight mask! Keeps my ends feeling hydrated and makes the rest of my hair soft and shiny.

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Not great

I've been using this deep conditioning treatment once a week for about the past five months now, and I have to say aside from being soft the very next day, it really doesn't make a difference. I started using it because I wanted to go longer between trims (my ends get SO damaged and dry), and I thought it would prevent them from getting to the point where I jut have to chop them off, but it does not. For as much money as it costs, I don't know why anyone would invest in it or why Kerastase is so lauded. I'm switching to Macadamia.

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My Hair Loves This

I get highlights four times a year and this treatment keeps my hair strong, manageable and beautiful. I cannot recommend highly enough.

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GREAT product for damaged hair

I love this - Kerastase never disappoints. This product worked wonders with my thick, damaged, color-treated hair. I highly recommend.

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The BEST

I use this once and week and each time I feel like it brings my hair back to life. Since I bleach my hair and blow dry/flt iron often, it definitely needs more support. I love this product, it has not let me down!

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Love this Masque

Love this masque! When I combined it with the shampoo my damaged hair was so thankful. It only took about 1-2 weeks for me to see a huge noticeable difference. Especially useful if you have dry ends.

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best ever

this will reverse damage like no other, this is the best strengthening product known to man! repairs down to cortex... Blondes take notes!

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