Reconstructive serum that repairs and delivers long-lasting style memory for damaged, split ends


Deliver every month(s)

You can cancel or edit your auto-replenishment orders at any time in My account.

Same Day Shipping When in Stock
  • Share Share L'Oreal on Facebook
  • Pin It
  • Benefits
    • The first reparative dual-serum that targets the highest level of hair erosion and fill the gaps in the fiber
    • Reconstructs hair intensifying strength from roots to ends
    • Use in conjunction with any Kérastase Thermique for long lasting results
    • Repairs and seals split ends
    • Delivers long lasting styling results
    • Gives a non-greasy, fresh haircut feel
    • Smoothes the surface and adds shine
  • How to use
    • After blow drying with any Kerastase Thermique, apply to completely dry hair from mid-lengths to ends
    • Flat iron or blow dry to heal and seal the hair and impart lasting and smoothness
  • Key Technology

    • Intra-Cylane: Recreates a holding structure around each breakage point
    • Pro-Keratin: Fills in the gaps in the cortex
    • Ceramides: Build external cohesion and smooth the surface cuticle
  • Reviews

Recommended for FIBRE ARCHITECTE:

  • Reviews
  • FIBRE ARCHITECTE is rated 4.7727 out of 5 by 44.
    Rated 5 out of 5 by from Thank You Kerastase!!! This stuff is AMAZING. I've only been using it for one week and noticed an immediate improvement in my damaged, awful split ends. True to the other reviews it is expensive for its size, but this is seriously the holy grail of leave-in repairing products. I have fine, blonde, curly hair and use it on damp or slightly towel-dried hair, and then use the Ciment Therminque on top of it. The combination is not too heavy and works miracles! I blow dry my hair and go over it with a flat-iron, and my hair is the softest, shiniest, silkiest it has ever joke it's baby soft and smells great. What else can I say? I simply adore this product!
    Date published: 2015-09-02
    Rated 5 out of 5 by from Love it...but... I bought this after a bolayage which is the perfect time to buy. My hair was extremely damaged and my hairstylist said this product repairs from inside out. That's not true since hair was damaged I had to cut off 2-3 inch. After that I started loving this serum!! Shines galore from just one pump, hair was soft and pretty. No frizz at all. I wasn't planning on buying it again but now I'm in love! The smell is also one of faves (fruity) along with oleo relax oil (reminds me..beach).Only issue i have is that it wouldn't be Kerastase if they are not charging 40 for 1 oz bottle...Come on!! At least put in more!
    Date published: 2015-06-29
    Rated 5 out of 5 by from Miracle new product I swim everyday and my untamable frizzy hair and lack of blowdrying skills left me walking around like a madwoman. In my desperation to do something about my hair, I watched the show on youtube with the model, and decided that if FIBRE ARCHITECHTE could fix that model's hair problems, it could fix mine. I followed the instructions when the product arrived, applying it to dry hair and afterwards sealing the product with the flat iron. Ten minutes later, when my husband met me in the city, he told me he almost fell off his chair. He said he couldn't understand how I had had time to go to the salon for a blow out. Yes, the product's price might be steep, but the ROI is high. I put in forty two dollars, and now look like a million! ;)
    Date published: 2011-11-02
    Rated 4 out of 5 by from Don't love the smell, but love the results. My hair frizzes at the hint of moisture. And this product put a stop to that. So I will definitely continue to use it. However the scent of Kerastase products seem to have changed over the years. To me they smell too clinical and less "fresh". I'm also wondering on this product, since the button dispenses from 2 chambers in the bottle, will it continue to dispense equally as I reach the bottom? The good news is, because you only use a tiny bit each time, it will take quite a while to find that out. Overall, happy with this purchase.
    Date published: 2013-04-16
    Rated 5 out of 5 by from The Best $42 you will ever spend! I have literally spent thousands on my hair in my lifetime on products and nothing has compared to Fibre Architecte. I noticed a difference the very first time I used it, which is a first!Not to mention it smells so good too! After drying my hair I place a nickel size in my hands and rub together to emulsify and then disburse thru the length ends of my hair paying special attention to the ends and then I flatiron.My hair looks like I left the salon every morning when I leave the house. It is a miracle drug for my hair. I hated spending the money at first but I completely did NOT think about that after the first use. And with using so little, it will last a while. Money well spent and am FINALLY in love with my hair! Don't hesitate, this is a no-brainer ladies!
    Date published: 2012-02-13
    Rated 5 out of 5 by from Best product I've used!!! My hair has become increasingly dry, brittle & was breaking off at the ends!!! I've been highlighting my hair as well as flat ironing it every other day. Nothing I used seemed to help with the split ends & dryness, so I decided to stop highlighting for a couple of months. I read about fibre architecte in a magazine...a model was reccommending it since her hair goes through a lot of abuse. What a difference in my hair & the split ends in just a week!!!!! I also bought the Bain de force shampoo & masque that I use every other day. I can't rave enough about how much of an improvement they have made to my hair. I now can go back to highlighting my hair without worrying about the breakage & split ends!! Thanks for a great product...I only wish the bottles came in a larger size!!!
    Date published: 2012-02-17
    Rated 5 out of 5 by from Another Little Miracle Wow what I have I even stumbled upon this stuff is AMAZING. I use it right before flat-ironing and sometimes on towel dried hair. No damage while flat-ironing now, and my hair stays silky for days. My stylist is all about conserving product and she taught me how to use this so that the bottle (though small) will still last me months. Adore this product. I also love the dual pump dispenser. Knowing that I'm getting two very active ingredients to treat my hair is great.
    Date published: 2012-05-01
    Rated 3 out of 5 by from Just okay I already left a review for this product and am disappointed that Kerastase decided not to publish a review that isn't a 5 star. This makes me think that only positive reviews are published in order to persuade buyers to get the product. I would've left a 5 star review had this product continued working exceptionally well, however after a few uses my hair was back to its original state - it got used to the product. Also, the green side of the bottle was empty weeks before the clear side even though I've been careful to dispense evenly every time. Fibre Architecte doesn't do anything more than what much cheaper products can do. That being said, I will not be repurchasing this product. Also because my honest reviews were not published I won't be shopping here as much as I used to as my trust in the company is no longer there.
    Date published: 2012-10-10
    • 2016-01-20T07:27CST
    • bvseo_cps, prod_bvrr, vn_cps_3.1.6
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_44
    • loc_en_US, sid_FA00000, PRD, sort_relevancy
    • clientName_kerastase-usa