ISDIN Si-Nails Serum Nail Strengthener

Product Overview

ISDIN Si-Nails Fast Absorbing & Hydrating Nail Serum Strengthener supports the strength of thin, brittle nails.

This innovative nail strengthener helps promote nail growth and has been clinically proven to strengthen brittle nails by increasing thickness, density, and durability of the nail and cuticle. Providing visible results in just 14 days, this nail treatment also uses cationic hyaluronic acid to provide cuticle moisturization.

Key Features:

Silanediol salicylate promotes silicon, which is an essential mineral in the nail
Pistacia lentiscus gum promotes keratin, an essential component of strong, healthy nails
Repairs brittle nails and reduces roughness

Highlights

Promotes nail strength
Infuses nails with essential nutrients
Hydrates cuticles

Ingredients

Directions

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Product Specifications

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Customer Reviews (31)

Overall Rating

4.2

Based on 31 reviews

Review Summary

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LovelySkin Customer

Verified Purchase

October 07, 2024

Best treatment for nails

My derm recommended and have seen a difference in a short time

LovelySkin Customer

Verified Purchase

September 17, 2024

Fantastic Nails!

My dermatologist recommended this product due to ridges and thin damaged nails after years of acrylics. I was completely shocked that after 2 weeks they were thicker and the ridges were less obvious. Thank you Thank you! I will continue to purchase.

LovelySkin Customer

Verified Purchase

June 24, 2024

Tube defective

Nothing comes out of this tube no matter how many times you push the little button. Complete waste of money.

LovelySkin Customer

Verified Purchase

June 11, 2024

This Works!

I've tried everything from nail hardeners to Biotin and this is the only nail treatment that has shown quick and long lasting results. Downside is a pen only last for about a month if you use it daily.

Roberto

Verified Purchase

June 06, 2024

Nails are getting better

I have been using Isdin's nail hardening product for about 10 months and results are beginning to show

lss

Verified Purchase

March 23, 2024

Not great for cuticles

I bought because I figured it would help my cuticles which are really dry due to frequent hand washing. It takes a number of clicks to even get the product to dispense. I can't imagine trying to apply to the bed of each nail. Needless to say, my cuticles have not improved.

LovelySkin Customer

Verified Purchase

March 20, 2024

Great product

This is a wonderful product for nails and toenails. My nails were horrible, thin and peeling. I used this little magic wand and they improved so much. Thicker and growing and it takes such little effort. Try it, you’ll be amazed.

Adams

Verified Purchase

March 08, 2024

GREATEST NAIL Strengthening Product

This is THE GREATEST Nail Repair and Strengthing I have EVER USED. Believe Me I have TRIED them All. It is SO EASY to APPLY and RESULTS that you can Visible be seen in 2 weeks. If you have tried as many Nail Strength and Growth Enhancing products as I have and they all didn't Work, then you have GOT to Buy this Repair which I Can Promise You WILL BE Happy you did.

LovelySkin Customer

Verified Purchase

February 11, 2024

Busy RN

Love, love this product! It has done wonders for my nails which were severely damages by Dip/gel manicures and improper polish remover. Catch it on sale and stock up!

LovelySkin Customer

Verified Purchase

January 19, 2024

ISDIN NAILS

keeps my cuticle hydrated <3

Bluzegirl

Verified Purchase

December 26, 2023

Helps nails

Easy to use, travels well. This formula soaks into nail and cuticle- not oily. I use regularly, fingers and toes. I really helped me get my nails healthy. I use it to maintain.

LovelySkin Customer

Verified Purchase

October 21, 2023

Researched Best

Three coats per nail plus the underside for best results. Of course, a well balanced diet and gloves for work help, too. Lasts two weeks. I bought two pens for a month supply.

LovelySkin Customer

Verified Purchase

October 21, 2023

ISDIN Si-Nails

I never fail to use this nail strengthener every night because it has cured my thinning weak nails! It is the best strengthening nail product I have ever used and I have recommended it many times to friends that have this problem with their nails.

LovelySkin Customer

Verified Purchase

August 19, 2023

Does what it says on the tin

Overall this is a fine product. The applicator works well, you can get really close to the edge of your nails just fine. Also the applicator feels pretty premium for what you spend on it, the cap snaps nicely and everything and the button feels well designed. It's not a *game changer* in terms of strengthening the nail but it definitely does the job after a couple weeks of applying it.

LovelySkin Customer

Verified Purchase

August 02, 2023

The only product that works for me

I have naturally weak nails which peel and break very easily. I have never had artificial nails, so I cannot speak to whether or not this product will work if that is the issue, but for me, this is the only product that has ever actually made my nails stronger. The packaging says 14 days to see results, but it actually took about a month and a half for me; however, it was worth the wait because for the first time, my nails have been able to grow past the end of my fingertips. I also like that the product absorbs into the nail instead of sitting on top of it, like a clear polish - which is what most nail strengtheners do. I tried going without it to see if I was imagining the change, but sure enough, after about two months without it, my nails started peeling and breaking again. I will never be without this product as long as they make it.

LovelySkin Customer

Verified Purchase

August 01, 2023

Health issues led to ridiculously weak nails ...

Since childhood my nails have been paper thin due to autoimmune issues. I saw a recommendation for this product in Real Simple magazine and decided to give it a try. For the first time in my life, I actually have ten nails that can support a decent french manicure. Are they rock hard? No way. But with daily application and care, I've achieved something that I really never thought possible. I've tried many other products. Many helped but all of them left me with top-coated nails requiring more maintenance than Si-Nails. This product simply vanishes into the nail. Easy to follow with polish if desired. Spendy - but worth it, IMO.

marblou

Verified Purchase

July 27, 2023

I think it’s working???

There are so many variables when trying to determine whether a product is working, but I think I’m seeing a change. Because I swim, my nails are perpetually splitting. This seems to be helping. I was surprised to see that the directions say to wipe off any serum that gets on skin. I thought that it was supposed to help cuticles. Wiping off makes use a little less convenient.

betabree

Verified Purchase

June 12, 2023

helpful nail aid

I have been using this for a few weeks now, and have noticed a difference. My nails had been destroyed by a couple gel manicures and one terrible removal by someone who clearly had no interest in taking the time or care to remove the polish carefully. My only issues with this product are that you have to apply it multiple times a day, depending on how often you wash your hands, etc and the delivery system. The click pen applicator is unreliable, and falters between too much product and not enough product. The results however, have been noticeable enough that I have purchased a backup. The damaged areas haven't completely grown out yet, so I'll be needing this for a while longer to help manage the peeling and splitting.

Duka

Verified Purchase

May 31, 2023

Hard Pass

This product didn’t help my nails even a smidge. It did apply well and dry fast however.

SaltLakeCity

Verified Purchase

May 29, 2023

Quick Drying

I like this produce because of how easy it is to use. It dries so quickly there is no need to wait, and I can move right on to the next thing I have to do.

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ISDIN Si-Nails Fast Absorbing & Hydrating Nail Serum Strengthener

Product Overview

ISDIN Si-Nails Fast Absorbing & Hydrating Nail Serum Strengthener supports the strength of thin, brittle nails.

Highlights

Ingredients

Directions

Shipping & Returns

Questions & Answers

Product Specifications

Special Offers

Featured In

Customer Reviews (31)

Overall Rating

Review Summary

Write a Review

Best treatment for nails

Fantastic Nails!

Tube defective

This Works!

Nails are getting better

Not great for cuticles

Great product

GREATEST NAIL Strengthening Product

Busy RN

ISDIN NAILS

Helps nails

Researched Best

ISDIN Si-Nails

Does what it says on the tin

The only product that works for me

Health issues led to ridiculously weak nails ...

I think it’s working???

helpful nail aid

Hard Pass

Quick Drying

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