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Rating: 3.7Based on 33 reviews
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- Most helpful positiveThe post was made 4 daysRating: 4 out of 5
Perfect for Scandinavian hair – long-lasting, fragrant, and adds shine
I have tested this leave-in serum for a couple of weeks on my fine, Scandinavian hair — and I am really satisfied. The consistency is wonderfully light, not heavy or oily, but spreads smoothly in towel-dried hair. The product feels really long-lasting — for my hair, a very small amount is enough to notice a difference, which is a big plus. The scent is also appealing; it has a subtle “salon-luxury” feel – not overwhelming, but enough for the hair to smell fresh after washing and styling. After application, I find that my hair becomes softer and feels more manageable — the ends look fresher, and the frizz, which easily appears in my hair, is noticeably subdued. Additionally, my hair looks a bit shinier without feeling sticky or heavy. As for the results: for my hair, the serum has delivered. Even though my hair is quite fine, I notice that the product strengthens the feel of my hair, it doesn’t feel as “fragile” and easy to break — which is exactly what I hoped for. The fact that it also protects against heat styling and helps improve texture makes it feel like an investment worth its price for anyone wanting to give their hair a little extra care. If I were to point out a few minor things: since the product is so long-lasting, it may require a bit of trial and error regarding the exact amount (during my first few times, I used too much, and it felt a bit “clear”). I am participating in a test panel and received a free test product.539 views - Most helpful negativeThe post was made 1 weekRating: 1 out of 5
Honest review of the serum as a test product
I had the honor of testing the Kérastase Première Sérum Filler Fondamental Hair Serum for free. My first thought was that the container and packaging exude quality. The bottle feels sturdy and looks nice, which is great so you don’t have to hide all your products in a cabinet. The consistency felt lovely, and upon application, my hair felt wonderful, but unfortunately, that’s where my positive feedback ends. The serum was really not for me unfortunately. It has a very strong scent that is quite masculine, which was not at all a favorite of mine. Furthermore, I experienced that the serum had negative effects on my hair. I have thin and fine hair with waves/curls, and even though the serum is supposed to be for all hair types and combat frizz, I just got more frizz and the texture of my hair flattened out, which made my hair look damaged. I didn’t get shine, softness, or reduced frizz, unfortunately. Unfortunately, I think a serum in this price range should hold a higher standard, therefore I was extremely disappointed with the result, even though I tested the serum several times with different amounts of product each time. Now I just hope that my waves/curls return if I stop using the serum 💔 I am participating in a test panel and received a free test product.188 views - The post was made 2 daysRating: 4 out of 5
Incredibly good product, highly recommend!
I have bleached my hair and have very fine Scandinavian hair, so I have hair that easily gets damaged, frizzy, and dry. (You can see before and after pictures when I used the serum). This product has really helped my hair from the first use, and I find my hair much easier to brush and feel that my hair gets more texture and feels thicker. My frizzy hair becomes smooth, and you can clearly see that it reduces the appearance of split ends! 😁 I often find that products lay like a film on the hair and that the hair feels heavy, but this product melts in nicely and creates just a lovely texture instead of a sticky feeling, something I really appreciate! The scent feels luxurious to me, like you just came from the hair salon. If the hair gets humid again due to rain or similar, the hair smells absolutely lovely again even though it’s been two days since you applied the product. The price may seem a bit high, but I really think it’s worth it, the product feels economical and like it will last a long time. In my pictures, you can see a before picture without the product and a picture where I have only used the product and blow-dried it, so I haven’t styled it yet. I have used the product together with Kerastase Elixir Ultime L’Huile Originale Hair Oil and loved that combination 🥳 I am participating in a test panel and received a free test product.92 views - The post was made 3 daysRating: 3 out of 5
Not worth the hype
I want to like this product so much but honestly, I don't feel like it does anything for my hair. It feels and looks the same whether I use the serum or not. The scent is nice, it doesn't smell too strong but it smells good. The packaging is a bit heavier and feels more expensive, which I appreciate. Based on my own experiences, I wouldn't say the product is particularly good value as it doesn't meet all the criteria it promises. My hair is just as frizzy with or without. Maybe it gives a little shine, my hair is flat in the picture. As for whether it repairs the hair from the inside, I can't comment since I haven't had it for that long. It gets 3/5 stars from me. I am participating in a test panel and received a free test product.131 views - The post was made 6 daysRating: 5 out of 5
Gamechanger! 💛
I have been testing Kérastase Première Sérum Filler Fondamental for a while now and I am truly impressed! My hair feels instantly stronger, especially in my bleached highlights that were previously dry and fragile. The serum makes my hair soft, shiny, and easy to detangle without weighing it down, and it works just as well for styling as when I let my hair air dry. Perfect for our cold, dry climate where hair easily becomes frizzy and brittle. ✅ Plus My hair feels strengthened and healthier, especially in the bleached areas. Makes hair soft, shiny, and manageable without becoming heavy. Heat protection up to 230 °C, perfect before blow-drying or flat-ironing. Contains citric acid and glycine that help rebuild damaged hair. Reduces frizz and provides a smooth, well-nourished result even without styling. ❌ Minus If you have fine European hair – start with a small amount! If you use too much, it can feel a bit heavy. The scent is quite strong, so not optimal if you are scent-sensitive. The price is on the higher end, so I recommend buying it on sale. A truly luxurious and effective product that gives salon feel at home. My hair feels stronger, healthier, and shinier after a short time. For me, it is definitely worth 5/5, especially for bleached or damaged hair! 💛 I am participating in a test panel and received a free test product.142 views - The post was made 1 weekRating: 4 out of 5
The hair becomes very manageable!
I thought this product would help make my hair less frizzy. And it does!! After just one use, you can really feel and see the difference! The hair becomes manageable, and frizz is absolutely not a problem! My hair is actually in need of a trim right now, but I tried this first, and I must say the ends feel much fresher! The reason it gets 4/5 ⭐ is that if you, like me, naturally have very straight hair, it becomes very difficult to put up or style, as it becomes very manageable and shiny, like hair ties just fall out 😅 In the picture, I have used the product 1 time after washing my hair. For my hair, 1-2 pumps have been sufficient, which means it lasts a long time! 🥰 I am participating in a test panel and received a free test product.160 views - The post was made 1 weekRating: 4 out of 5
Love-Hate
I have a bit of a love-hate relationship with this product. The packaging feels very luxurious and the serum really smells soooo good. I've tested it a couple of times and it makes my hair feel soft, smooth, and shiny. But it has also made my hair greasy, the same feeling as when you don't rinse out all the conditioner. Then my hair gets greasy quickly, which probably affects a lot. But I think the positives outweigh the negatives and that it's really worth trying!! I'm participating in a test panel and received a free test product!149 views - The post was made 1 weekRating: 2 out of 5
Honest review as a test pilot
I experienced that the product didn't help in the morning at all. I have Scandinavian hair, a lot of hair but very thin. My hair got greasy quite quickly, I really didn't feel like the product did anything. Maybe I used too little, but I thought 4-5 pumps for the hair just above the chest should be enough, every time I blow-dried and styled my hair, but as I said, the product gave nothing, neither a pleasant scent nor anything. I actually do not recommend it for the hair type that I have! I am participating in a test panel and received a free test product.160 views - The post was made 1 weekRating: 4 out of 5
Worth a try!
I got to test this serum through smartsson. I think the serum feels good in the hair and seems to do its thing. It doesn't feel frizzy at all and it doesn't weigh the hair down, which I appreciate. I wouldn't necessarily say that my hair gets shiny from the serum, but I also feel that my hair isn't at its best right now. I have a 9-month-old baby and I'm breastfeeding, so I assume that’s related. I'm participating in a test panel and received a free test product.209 views - The post was made 1 weekRating: 2 out of 5
A disappointment
Unfortunately, this serum did not live up to expectations at all. The scent is strong and smells like an old lady's perfume, which makes me not even want to put it in my hair. I also notice no difference, neither in softness, shine, nor hydration. My hair feels exactly the same as before, despite several attempts. I expected more considering the price. The positive aspect of the product is the consistency and the bottle, the pump function is really good. I am participating in a test panel and received a free test product.203 views - The post was made 1 weekRating: 3 out of 5
Honest Review
I was really looking forward to trying this hair product, as I have read a lot of good things about its ability to tame frizzy and damaged hair, which is something I really need. The packaging exudes quality, and I sincerely hoped this would be the solution for my tired hair. The consistency is pleasant, and the scent is a refreshing blend of citrus and a hint of masculine perfume? Additionally, it's a big plus that it doesn't weigh down the hair or make it oily. I also experienced some improvement in split ends and increased shine in my hair, which is positive. But despite this, I feel a bit disappointed. I had hoped for a more noticeable effect on my frizzy hair, as well as deeper hydration and nourishment. The result is acceptable but nothing wow. Sure, the hair gets a nice shine and split ends look somewhat better, but it's not enough for me to feel that the product really makes a big difference. In summary, it's a perfectly okay product, but not something I would invest in again. I am participating in a test panel and received a free leftover product.173 views - The post was made 2 weeksRating: 2 out of 5
Sérum Filler Fundamental Hair Serum
I have naturally wavy hair that easily gets frizzy, especially since I often use heat tools and haven't always been so careful with hair care. I hoped this product would make my hair softer, give it more shine, and reduce frizz, but despite trying different amounts, from 2 to 4 to 6 pumps, I unfortunately saw no noticeable difference. The consistency is thin and feels neither oily nor silicone-like. The bottle is luxurious and the scent is fresh and citrusy, which I really like. I just wish the results had lived up to the nice packaging and lovely scent. I am participating in a test panel and received a free test product.144 views
KérastasePremièreSérum Filler Fondamental Hair Serum 90 ml
Sale price 60,77 €
Ord. price 71,50 €
Campaign 15%
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Free shipping, sent from our warehouse in Sweden
Description
Ingredients
Sérum Filler Réparateur by Kérastase is a leave-in repairing anti-breakage filler hair serum. This anti-frizz serum works to seal and fill hair strands, and protect them from the heat of styling tools, leaving hair shiny and strong.
Kérastase Première Sérum Filler Fondamental is a lightweight leave-in treatment for the inner repair of all types of damaged hair, leaving it glossy and supple:
- Repels humidity, deeply nourishes and locks out frizz;
- Fills fiber surface with matter to recreate softer and smoother hair;
- 55% softer hair*
- 3x more moisturized hair*
- Protects from heat, up to 230°C*
- 99% stronger hair*
- 72H anti-frizz*
*Instrumental test after 1 application of the serum
Use:
Apply on towel-dried hair.
Leave-In. Blow-dry and heat style
90 ml
- Category:Leave-In Treatments
- Article number:1015-598-0090
Also available in bundle
Kérastase
Pre-shampoo, Bain, Serum163,90 €
Without bundle: 163,95 €
