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ISDIN SI-NAILS Nail Strengthener Cuticle Serum Treatment with Hyaluronic Acid , 0.08 Fl Oz (Pack of 1)

  • Based on 2,067 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Jan 18
Order within 4 hours and 16 minutes
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Brand: ISDIN


Specialty: Strengthener


Number of Items: 1


Unit Count: 1 Count


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 1.61 x 1.14 x 5.67 inches; 0.32 ounces


Country of Origin ‏ : ‎ Spain


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jan 18

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Top Amazon Reviews


  • ISDIN SI-NAILS
This product really works! I had my gel nails removed and my own nails underneath were a mess. Ridges, discoloration, splits and peeling. Quite unattractive but I was just tired of the two week routine of having them done. A friend who had her gels nails removed said it took four months for them to get back to normal. Unfortunately she didn’t know about this product. I found it by doing a ton of research. I began using this product three weeks ago today and see major improvement already. I actually had to clip them last night because they had grown so much. I already have more than a quarter of an inch of new growth. The new growth is free of any imperfections. I’m excited to see the final results. . I apply it at night when I’m done using my hands. I make sure to include my cuticles as well as the nails as the directions say. It dries quickly and does its thing overnight. Once my nails are back to their natural state I plan to continue using it. I’m unable to say how long the pen lasts because as I said I’ve only used it for three weeks. I did some research and some people said it lasts a month. I’ve have a subscription but just bought another to have it in hand. I highly recommend ISDIN! Absolutely worth the price! ... show more
Reviewed in the United States on October 27, 2024 by Sandra

  • Amazing results!
This stuff was literally an answer to prayer! HIGHLY RECOMMEND! I had been struggling with thin, peeling nails for over a year. I had back-to-back surgeries and my dermatologist told me my damaged nails were probably a result of the anesthesia. (I've never done regular manicures and very rarely polish or gel, so I couldn't blame that.) My nails were so thin they hurt and they would continually split and peel no matter how much I used nail strengthening treatments or polishes. I was at my wits end and tried ordering ISDIN as a last resort. I thought it was a little expensive at the time, but now I believe it was worth every penny! I keep an extra tube on hand now so I never run out. The product and brush are so easy to use. In the beginning I applied it twice a day but tried to keep using it at least once a day for two months. Now that my nails have improved I use it about every 1-2 days. The product is easy to apply and dries and disappears very quickly. I was worried it would be messy and sticky but it is not at all. Sometimes it takes one click per nail to get it going, but sometimes one click will treat a few fingers. A little goes a long way and you will get the feel of it. The product does take time to work. It was 2 months before I had a complete nail grow out without peeling. They are strong now but I am still careful to not use my nails as "tools" so that I don't break them. I still have a split on my thumbnail but I believe it will grow out as long as I am careful and keep applying the product every few days. I will say my nails are a little "ridged" and I don't know if that's just my nails or a result of the product, but it is a small price to pay for strong nails and I can just buff them down smooth. The photos you see are: 1. at the beginning of use, 2. after 6 weeks of using the product, and 3. at 2 1/2 months (they do grow longer but I like to keep them short) Don't hesitate! Buy this product! ... show more
Reviewed in the United States on June 4, 2024 by Letty Graff Letty Graff

  • Leaks. Ran dry in under 2 weeks.
Couldn't test if the claims that this product improved nails in as little as a month, as it ran dry in less than half that time. It was only turned tip down when in use. It was certainly never stored in that position. At first, it was stored laying on it's side on my bedside tray between uses. It did not leak while the cap was closed, but I quickly became concerned that product was being wasted when so much poured out the moment I removed the cap. I switched to storing it tip facing up in a small pencil box. After the change, no product poured out just by removing the cap. The instructions tell you to pump once for EACH nail. I never had to pump more once for ALL of them, and often there was still more than my nails could even absorb. For the first week. After that, there was considerably less. It has now been less than 2 weeks it and it is completely dry. It might be a good product in poor packaging?? Couldn't use it long enough to find out. It is of course possible I just got a dud. But I'm not willing to shell out another $29 to find out. Very disappointing. ... show more
Reviewed in the United States on July 4, 2023 by DD

  • Cracked distressed nails have improved with 2 days of usage.
This product is amazing. Within 2 days of usage my cracked, rough nails no longer show this distress! Now I wait to see if the nails will actually grow.
Reviewed in the United States on November 14, 2024 by Marion

  • Helps harden weak nails
Got these for my girlfriend and it hardened her nails really good she was very happy
Reviewed in the United States on January 4, 2025 by Ty

  • Pricey
Too expensive and am not sure? If it worked
Reviewed in the United States on August 30, 2024 by Patricia

  • No more vertical split, well worth the $
My nails have always had vertical ridges but I was still able to grow long nails except for the middle finger of my right hand. As soon as the nail grew past the end of my finger the interior 3rd of the edge would split off. After hours of research the Isdin product sounded impressive. I faithfully applied several times a day and after a month the nail was still splitting but I attributed that to the newer treated part of the nail had not grown out. This photo is after 8 weeks and it's a miracle. The first time in years that this nail has not split. If you follow directions and give it time I think you'll find it works. I wish I had taken a before photo. ... show more
Reviewed in the United States on November 3, 2024 by Charsam Charsam

  • Pleasantly surprised!
I've tried numerous nail strengtheners over my life. I always was willing to give new products a try. although I was hopeful when I ordered this nail strengthener, I wasn't really expecting a lot. As with all products of this kind, you really do have to stick with it until your nails grow out. That took some time for me as my nails grow slowly. As they grew, I noticed they actully looked healthier. I stuck with it and after several months, my nails look amazing. They no longer chip, peel, or break like they did before. I don't usually give reviews on products, but this was so good that I felt i really needed to share my success with others with nail issues. Be patient because it really works! ... show more
Reviewed in the United States on October 18, 2024 by Sal Sac

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