Fondant Extentioniste is a creamy and light textured detangling conditioner that gently yet effectively acts as a hair detangler for easy comb-through without breakage and offers a uniform silky rinse. Enriched with Ceramides and Acid Maleic, it instantly infuses weak brittle hair with active and healing particles that strengthens brittle hair and promotes a healthy scalp environnement. Our strengthening and detangling conditioner Fondant Extentionsite, increases elasticity and strength while rebuilding the natural strength of brittle hair fiber.
Fondant Extentioniste is one of our hair strengthing products dedicated to bringing brittle hair back to life.
- Apply the shampoo to wet hair, massage well to release its rich, airy lather and aromatic fragrance.
- Rinse well.
Perform two shampoos before proceeding to Soin Fondamental.
Ask more information about this productRating & Reviews
Mary Lou
51.776904207E12 22/04/2026
Extended conditioner
[This review was collected as part of a promotion.] I use it with Chronologiste and love the way my hair feels!
Originaly posted on kerastase-usa.com
Deejie
51.777204811E12 26/04/2026
Love this conditioner
Leaves hair feeling clean and lightweight. I use in between shampoos and my hair is so silky soft and smooth. I have fine hair that tangles easily and blonde colored
Originaly posted on kerastase-usa.com
Kelly615
51.775314813E12 04/04/2026
Clean and Fresh
[This review was collected as part of a promotion.] I love this conditioner it leaves my hair smelling fresh. My hair texture has improved since I started using this product
Originaly posted on kerastase-usa.com
Bianca1989
51.77480991E12 29/03/2026
Great
[This review was collected as part of a promotion.] 5 stars. This is amazing. I have been using this for years and my hair has never been better. I love this product!
Originaly posted on kerastase-usa.com
Nunyabiz
41.774394115E12 24/03/2026
I liked it
Liked it not loved it. But it helped. Not sure if I would buy it again for the price. I prefer the spray protectants over this
Originaly posted on kerastase-usa.com
Stéphanie T
51.773845139E12 18/03/2026
Excellent produit mais format trop petit
Le produit sent bon et mes cheveux me semblent plus forts. Je retrouve moins de cheveux qu’avant sur ma brosse et sur le sol de la douche. J’aimerais que la quantité soit plus grande car avec de longs cheveux, on épuise rapidement la quantité de la bouteille.
Originaly posted on kerastase.ca
KRSWIM
51.772917208E12 07/03/2026
Fantastic
[This review was collected as part of a promotion.] Wonderful conditioner to help with my hair damage and breakage!
Originaly posted on kerastase-usa.com
Pixie7720
51.773089116E12 09/03/2026
Stronger, Healthier Hair
I love the Kérastase Resistance line. It’s made my hair feel stronger, smoother, and much healthier with noticeably less breakage. A little goes a long way and it doesn’t weigh my hair down. Definitely worth it if your hair needs repair. ✨
Originaly posted on kerastase-usa.com
Mikapo
51.772451012E12 02/03/2026
The absolute BEST Conditioner
I have been using this conditioner for a month now, and have had around 0.5 - 1 inch of hair growth. My hair overall feels more moisturized, healthy, and longer. I am obsessed with this product, and will continue to recommend it to everyone!
Originaly posted on kerastase-usa.com
Barweston
51.772132415E12 26/02/2026
Best for final step
Conditioner softens without weighing hair down. Effective for dry hair, hydration and repair, also long lasting scents.
Originaly posted on kerastase-usa.com
Jatmagg
51.771614011E12 20/02/2026
Longer and Stronger!
[This review was collected as part of a promotion.] Needed this for my hair that is thinning as I age.
Originaly posted on kerastase-usa.com
Elegance EEE
51.771499714E12 19/02/2026
LOVE
I love this product! My hair length and health improves drastically, allowing me to achieve my desired style.
Originaly posted on kerastase-usa.com
Olaapp
51.770303618E12 05/02/2026
I LOVE
[This review was collected as part of a promotion.] My hair feels stronger and healthier than ever! My hair has actually grown so fast!
Originaly posted on kerastase-usa.com
Arlito
51.770177608E12 03/02/2026
Lightweight and moisturizing
[This review was collected as part of a promotion.] The formula is lightweight and moisturizing. It does seem a little watery, however it does its job. I have straight mid length hair fine hair and it works wonders!
Originaly posted on kerastase-usa.com
ShelleyfromTennessee
51.770166812E12 03/02/2026
Amazing results
This is a perfect shampoo if you live in humid climate
Originaly posted on kerastase-usa.com
JJCon68
51.769990406E12 01/02/2026
Fantastic
[This review was collected as part of a promotion.] Love the smell and how beautiful and healthy it makes my hair.
Originaly posted on kerastase-usa.com
DebCMR
51.769727606E12 29/01/2026
Great product
I love how it works for my hair type (fine and blonde). The smell is great too.
Originaly posted on kerastase-usa.com
LToland
51.769525117E12 27/01/2026
Conditioner
[This review was collected as part of a promotion.] Best conditioner ever! I have been using leave in conditioner because after washing and conditioning my hair, my hair still feels brittle - after starting this product, I no longer have to double condition.
Originaly posted on kerastase-usa.com
TOV222
51.769719785E12 29/01/2026
Helps my hair grow long
I have hair that I have never been able to get past my shoulders but with this shampoo and conditioner its almost mid back now after a year. I will be switching to the genesis to help with fall out but this has been great for getting real results
Originaly posted on kerastase-usa.com
SarahV1117
51.768571117E12 16/01/2026
Excellent quality product
[This review was collected as part of a promotion.] Best for helping me to grow out and maintain healthy long hair
Originaly posted on kerastase-usa.com
Bubbles2026
51.76842622E12 14/01/2026
Softness and Growth
The conditioner has given my hair softness and growth that I need. Given me hope for best results.
Originaly posted on kerastase-usa.com
Talita reis
51.767670206E12 05/01/2026
Loved the smell and resulta
[This review was collected as part of a promotion.] Really good product, the smell is great and results are amazing
Originaly posted on kerastase-usa.com
Alltom
41.767378614E12 02/01/2026
Good product
Overall, I’ve been using it for about a month and my hair does seem stronger. I will give it some more time. It does smell good though and my hair seems softer after use.
Originaly posted on kerastase-usa.com
Anonymous
51.767378614E12 02/01/2026
Good product
good for damage hair and smell good, my hair is more soft now. I recommend it.
Originaly posted on kerastase-usa.com
Bubbles250
51.766888108E12 27/12/2025
Tames my hair
This product is a gem for taming my hair. It’s recommended to help grow hair with consistency.
Originaly posted on kerastase-usa.com
Mitchb
51.766766613E12 26/12/2025
resistance
[This review was collected as part of a promotion.] Great line! Have used it for years! I know the difference when I run out!
Originaly posted on kerastase-usa.com
Dminfante
51.766701808E12 25/12/2025
Amazing
This is the only conditioner I use, I’ve been hooked for the last 9 years.
Originaly posted on kerastase-usa.com
OMKLiv
41.766701808E12 25/12/2025
Resistance Fondant Conditioner
Smells amazing! And the improvement I have seen is outstanding!
Originaly posted on kerastase-usa.com
Elizabethb843
51.766360709E12 21/12/2025
Evelyn cheever
51.766273406E12 20/12/2025
Incredible conditioner
I love these products, my hair is still good 4 days later!
Originaly posted on kerastase-usa.com
Beach Bunnie
51.766100607E12 18/12/2025
Hair Fall Remedy
Such a great conditioner. This helps with hair fall. I have less and less come out when I brush and it’s definitely helping my thinning hair. You won’t be disappointed in the least. A little goes a very long way - I have hair down to my mid back and I literally use a dime sized amount. Well worth every penny. I thought I was crazy for buying a conditioner this expensive at first, now I’m so in love with my hair I won’t ever go to another brand.
Originaly posted on kerastase-usa.com
Namehere
41.765575909E12 12/12/2025
Na
I think it works OK, but it’s a little thin and watery and it doesn’t cake the hair like you really want conditioner to do
Originaly posted on kerastase-usa.com
Nunyabiz
51.765350007E12 10/12/2025
Love it
Easy to apply and seems to protect my hair. All of their products seem to work really well
Originaly posted on kerastase-usa.com
Cruise 1
51.764688517E12 02/12/2025
Poop69
51.764688516E12 02/12/2025
L love this conditioner
[This review was collected as part of a promotion.] Works wonderfully for an everyday conditioner. Light
Originaly posted on kerastase-usa.com
Lynda48
51.764461708E12 29/11/2025
Love this
Works so great on my hair! I haven't had split ends in over a year!
Originaly posted on kerastase-usa.com
AAShni
51.764002708E12 24/11/2025
Amazing
This conditioner is great. Super lightweight on my hair and doesn't make me feel weighed down at all!
Originaly posted on kerastase-usa.com
Kaytxindaris
51.763663411E12 20/11/2025
Love
[This review was collected as part of a promotion.] Feels nice on ends. Not sure if it is helping with growth yet as I have not had it very long. But love it so far. Not too oily.
Originaly posted on kerastase-usa.com
Daniela C
51.763659809E12 20/11/2025
Amazingg
Immediately after one use, my hair felt the difference! My hair felt so smooth, voluminous (mind you, my hair is fine) and looked so luxuriously shiny. The shampoo and conditioner smells amazing. My go to routine is doing a blow out and flat iron a few pieces. That usually requires applying multiple products to achieve the shiny voluminous effect. I honestly don’t need to use extra products. Just the shampoo and conditioner itself is all I used. I finally found my forever hair care and I’m very thankful. Eventually I’ll try more products.
Originaly posted on kerastase-usa.com
Kristin C
51.763302508E12 16/11/2025
Game Changer
I needed help with my damaged frizzy hair and I can already see a major difference from using this system. I highly recommend.
Originaly posted on kerastase-usa.com
Hairenthusiast04
51.762668905E12 09/11/2025
REFRESHING!
[This review was collected as part of a promotion.] When paired with the shampoo, my hair has gained back not only its density but as well as its shine, manageability and strength. I know that after my first use, my hair was already repairing itself. My brush glides through with ease and tangles are little to none.
Originaly posted on kerastase-usa.com
Yayme73
51.761841809E12 30/10/2025
Great Conditioner
I enjoyed this product as it was very lightweight and it didn’t make my hair feel greasy.
Originaly posted on kerastase-usa.com
Wendi55
51.761079508E12 21/10/2025
Excellent
[This review was collected as part of a promotion.] This product restored my hair back to being long and healthy I would absolutely recommend this product to anyone not e having problems with breakage and hair damage to buy this product
Originaly posted on kerastase-usa.com
Squinn
41.761051608E12 21/10/2025
Healthy hair
[This review was collected as part of a promotion.] This has proved my hair health. I love the smell and the way it makes my hair feel.
Originaly posted on kerastase-usa.com
DrNina
51.760013913E12 09/10/2025
A must have for colored hair
My hairstylist recommended I switch to this product line after I complained of how keeping my hair blond is destroying it. We both saw such an improvement during my next appointment. If you are looking to keep your hair healthy and long while dying your strands, this is the product you need!
Originaly posted on kerastase-usa.com
Tasha F
51.761054311E12 21/10/2025
The best stuff
This stuff is amazing. I can definitely tell a difference in my hair length and texture.
Originaly posted on kerastase-usa.com
TeresaW
51.758996908E12 27/09/2025
Great product
Hair was over processed and dry helped a lot with repair
Originaly posted on kerastase-usa.com
Long Aging Hair
51.758652209E12 23/09/2025
Love this conditioner
[This review was collected as part of a promotion.] I love this product. I feel my hair has strengthened my hair.
Originaly posted on kerastase-usa.com
ChrissyK
51.758250805E12 18/09/2025
Lovely conditioner!
Great conditioner. Not too heavy for my fine hair, just makes it soft and silky and easy to comb. I use a little less than a quarter size amount, split into two parts. I put half in my hands and rub together to spread it out, then finger comb it through my mids to ends to distribute it, finger combing and focusing extra on my ends. Repeat on other side. Really enjoy this line!
Originaly posted on kerastase-usa.com
Van Huynh
51.757747711E12 13/09/2025
Gift for my hubby and he likes it
Got it for my man and he likes it a lot. Keep his hair fresh, smooth and healthy.
Originaly posted on kerastase-usa.com
sarah3000
51.757771109E12 13/09/2025
Very effective product!
[This review was collected as part of a promotion.] This conditioner has really helped my severely damaged hair. Tried a lot of other conditioners attempting to repair my hair but none compare to Kerastase. They really are the best.
Originaly posted on kerastase-usa.com
jennmarie213
51.757516432E12 10/09/2025
One of my favortive lines
I am working on growing my hair out I normally have alot of breakage. I love this line the scent lasts, and my hair is healthier.
Originaly posted on kerastase-usa.com
Vickies
51.757389512E12 08/09/2025
Great product! My new go to.
My hair feel like silk after using this conditioner.
Originaly posted on kerastase-usa.com
FurMama
51.756680307E12 31/08/2025
Works well esp on highlighted hair.
[This review was collected as part of a promotion.] I like it better than the blonde product line. My hair is fine and it Getsmrid of dryness and adds shine, looks healthier.
Originaly posted on kerastase-usa.com
Sweetblondebee
51.756053922E12 24/08/2025
Gorgeous Locks!
I love this conditioner! I have fine, highlighted, medium length hair with quite a bit of split ends. This product has helped my hair look and feel stronger, healthier, and more hydrated. It has done wonders for my ends so far. I will be repurchasing again!
Originaly posted on kerastase-usa.com
rafacd
51.755283525E12 15/08/2025
Saved my damaged blonde hair!
My hair was extremely damaged from blonde highlights. Because it’s fine, every wash left it tangled and impossible to brush. This conditioner was the only product that made brushing manageable—it truly saved my hair.
Originaly posted on kerastase-usa.com
CatBee
51.75465531E12 08/08/2025
ITS PURE SILK!
Another great regimen from Kerastase! RÉSISTANCE FONDANT EXTENTIONISTE CONDITIONER and its entire regimen is one of my favorites! It does what it says plus some ❤️
Originaly posted on kerastase-usa.com
DSP1001
51.754318758E12 04/08/2025
Moisture!!
Highly moisturizing without making my hair greasy - exactly what I needed.
Originaly posted on kerastase-usa.com
Nat Savage
51.760581349E12 15/10/2025
Makes your hair soft
I bought this particular line to help the length of my hair, I have only used it twice but my hair is so soft !
Originaly posted on kerastase-usa.com
Denan01
51.753819209E12 29/07/2025
Love it!
I love this product! It leaves my hair feeling soft and smells so good!
Originaly posted on kerastase-usa.com
hrobertson256
51.753246807E12 23/07/2025
Game changer
[This review was collected as part of a promotion.] This conditioner is bringing my over processed hair back to life. I can already tell a difference after 2 washes.
Originaly posted on kerastase-usa.com
Tiffanys
51.753160406E12 22/07/2025
Reduces breakage and helps my long hair grow
[This review was collected as part of a promotion.] This conditioner is super nourishing without weighing down my fine hair. It's less tangled, easy to comb through and helps me maintain my long hair with minimal breakage.
Originaly posted on kerastase-usa.com
Palomaduarte
51.753023606E12 20/07/2025
A little goes a long way
[This review was collected as part of a promotion.] So far, I have not noticed changes in length, however, the immediate result after washing my hair is noticeable. My hair looks smoother and way more manageable. A little goes a long way!
Originaly posted on kerastase-usa.com
Tunafied
51.752811223E12 18/07/2025
Love this product!
Left my hair soft and manageable. Lasted for a while.
Originaly posted on kerastase-usa.com
rtmaelys
11.752457513E12 13/07/2025
déçu
Franchement j’ai les cheveux vachement longs et ça me les a rendu tout sauf beau ou brillants.
Ça m’a abimé les pointes et mes cheveux s’emmêlent tout le temps alors qu’ils ne faisaient jamais ça auparavant.
Originaly posted on kerastase.fr
Sammie33
41.751645707E12 04/07/2025
Satisfied
[This review was collected as part of a promotion.] I like the smell. I’m not really sure if it’s having any major effects, but it’s definitely not hurting anything. My hair seems to be growing like normal and I’ve had typical amounts of damage. I don’t think it’s doing a huge job protecting breakage, but it’s not making anything worse.
Originaly posted on kerastase-usa.com
Mali The Alley Cat
51.751141708E12 28/06/2025
Résistance
[This review was collected as part of a promotion.] I love it, smells light and amazing and works as intended. My hair is healthier with every use.
Originaly posted on kerastase-usa.com
Laurie Mount
51.751026508E12 27/06/2025
This shampoo is amazing
If you use this full product line this conditioner leaves your hair feeling like SILK!
Originaly posted on kerastase-usa.com
Molly Ann
51.750763709E12 24/06/2025
Helps strengthen
[This review was collected as part of a promotion.] It helps strengthen and almost makes your hair feel silky smooth.
Originaly posted on kerastase-usa.com
steenyx33
51.750519806E12 21/06/2025
Will Continue to Purchase
I absolutely love this line and will continue to purchase!
Originaly posted on kerastase-usa.com
Soleci
51.749656707E12 11/06/2025
Great
[This review was collected as part of a promotion.] The best conditioner for me of the whole brand, the easiest one to brush
Originaly posted on kerastase-usa.com
Suraalhassan
51.749448804E12 09/06/2025
Tge best products i ever used
I’m in love with this product, changed my hair, added a lot of shine to my hair
Originaly posted on kerastase-usa.com
Laceyb
51.748654104E12 30/05/2025
Keeps hair strong
[This review was collected as part of a promotion.] Kept my hair healthy and strong without the feel of the product coating my hair. My hair has never felt stronger.
Originaly posted on kerastase-usa.com
Whitneyw
51.748488507E12 28/05/2025
Strengthens + Shines!
[This review was collected as part of a promotion.] Loved the combo of this and the shampoo when my hair was severely damaged after a nightmare hair appointment. This brought back the shine while strengthening from all the damage.
Originaly posted on kerastase-usa.com
Bianca Penny
51.748488507E12 28/05/2025
My daily
Light conditioning for every day use in between hair masks. Love the smell too. Doesn't weigh down my fine, bleached hair. Does a great job detangling.
Originaly posted on kerastase-usa.com
SaraG11
51.748349926E12 27/05/2025
Great conditioner
[This review was collected as part of a promotion.] This conditioner makes my hair so soft and well hydrated!
Originaly posted on kerastase-usa.com
Emily232
51.748239205E12 26/05/2025
Great Conditioner
[This review was collected as part of a promotion.] Gives me the softest hair I've ever had. The bottle lasts a long time too
Originaly posted on kerastase-usa.com
Sofiia
51.747521004E12 17/05/2025
Love it
[This review was collected as part of a promotion.] Love this conditioner. It makes hair smooth and fresh looking.
Originaly posted on kerastase-usa.com
LyneV
41.747316183E12 15/05/2025
J'aime bien
Tres doux et onctueux. Pas besoin d'en mettre beaucoup !
Originaly posted on kerastase.ca
Mirrasue
51.747116005E12 13/05/2025
Great
[This review was collected as part of a promotion.] I love this conditioner ! I have noticed a positive change in my hair’s health since using this. It also smells amazing.
Originaly posted on kerastase-usa.com
LilySa
51.747062909E12 12/05/2025
Lynda L
51.746787508E12 09/05/2025
Helped with breakage
This is the only shampoo and conditioner that has controlled my breakage and allowed me grow my hair longer.
Originaly posted on kerastase-usa.com
Elodie18
51.746334807E12 04/05/2025
Excellent produit
Tres bon j'adore le rendu sur mes cheveux je les perdaient beaucoup et là je vois une grosse amelioration je n'en perd presque plus
Originaly posted on kerastase.ca
KRFlynn
51.745957708E12 29/04/2025
Fantastic product
[This review was collected as part of a promotion.] This conditioner is wonderful! Pairs greatly with the shampoo and is wonderful for my hair!
Originaly posted on kerastase-usa.com
Aurora13
51.745848808E12 28/04/2025
Definitely works as intended!
It leaves my hair feeling so soft and lightweight!
Originaly posted on kerastase-usa.com
Elvistattoos
51.745287205E12 21/04/2025
Just a little is all you need
Price is high but doesn't take much Perfect for my thin fine longish hair. It feels like a great hair day every single time I use it
Originaly posted on kerastase-usa.com
EScotty
51.745335814E12 22/04/2025
FIXED MY HAIR
[This review was collected as part of a promotion.] LOVE this product has totally changed and repaired my hair from years of sun, ocean, and wind damage!!
Originaly posted on kerastase-usa.com
Anna Bananaa
51.745160307E12 20/04/2025
Tried & true
Safe to say this line is a staple in my routine for good reason! As someone with fine fragile curly/wavy hair, no other conditioner has softened my hair & strengthened it the way this line has. Literally after one wash the difference was insane. I’ve been using this for several years!
Originaly posted on kerastase-usa.com
MayraB
51.744819231E12 16/04/2025
love all kerastase shampoos
i love all their shampoos, hoping to grow my hair with this one
Originaly posted on kerastase-usa.com
EWindsor22
51.743545708E12 01/04/2025
A must repurchase!
I’ve been using this conditioner for about a year now and I swear by it! I’ve been struggling from hair loss and one of the shampoos my derm prescribed is very drying. This conditioner does a great job of combating the dryness and smells great.
Originaly posted on kerastase-usa.com
Vmelendez27
51.743104715E12 27/03/2025
Smells amazing!
Leaves your hair soft and smelling amazing. No need for a detangler with this conditioner.
Originaly posted on kerastase-usa.com
Magictape
51.743032706E12 26/03/2025
Everything is great
I have been trying all the products I can afford the last 6 months and every thing is SO good. My hair stylist has commented on my damaged hair being “hair” again and “feeling good”. This conditioner has made my hair, that had a hard time growing past a certain point, strong and my length looking GREAT
Originaly posted on kerastase-usa.com
Stefanny Martinez
51.742497207E12 20/03/2025
Amazing producto
I’m in love with this product, I really like the way it’s working
Originaly posted on kerastase-usa.com
AliGator
51.742251511E12 17/03/2025
Amazing for a smooth blowout
This product has been a game changer for my hair pre-blow drying! I use it every time I try my hair; it helps lock in moisture and fight frizz!
Originaly posted on kerastase-usa.com
Pamela Ozuna
51.77833242E12 09/05/2026
I love Kérastase
[This review was collected as part of a promotion.] [Employee of kerastase-usa] I don't like the way it leaves my hair, my hair feels very hard when I apply it, I liked the premiere line conditioner sample better.
Originaly posted on kerastase-usa.com
DylanR
51.742004904E12 14/03/2025
Best conditioner for fine hair
I absolutely love how this conditioner does not weigh my hair down!
Originaly posted on kerastase-usa.com
Dominic
51.741842904E12 13/03/2025
Espectacular!!
Unos de mis favoritos de la marca, la suavidad y el brillo que deja es increíble y cumple con lo que promete que es lo más importante!! Amo 💕
Originaly posted on kerastase-usa.com
Mombunz
51.741177812E12 05/03/2025
Smoothest conditioner ever
This is the best conditioner I've ever used. It completely promotes no hair breakage.
Originaly posted on kerastase-usa.com
Fanmael
51.740492914E12 25/02/2025
Love this
So happy with this product! Use it 2 times a week and great results
Originaly posted on kerastase-usa.com
Michigan
51.778332416E12 09/05/2026
Love it
[Employee of kerastase-usa] Great product. My hair is so smooth after using it.
Originaly posted on kerastase-usa.com
Fondant Extentioniste Conditioner 200ml
Kerastase - Résistance
A gentle restorative cream with detangling and nourishing forces for strong long hair.
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