---
product_id: 145823493
title: "Si-Nails - Fast Absorbing Nail Strengthening and Hardening Serum for Nail Durability in Thin Nails, made with Cationic Hyaluronic Acid 0.08 FL OZ"
brand: "isdin"
price: "R1320"
currency: ZAR
in_stock: true
reviews_count: 8
category: "Isdin"
url: https://www.desertcart.co.za/products/145823493-si-nails-fast-absorbing-nail-strengthening-and-hardening-serum-nail
store_origin: ZA
region: South Africa
---

# Infused with cationic hyaluronic acid & natural keratin promoters 0.08 FL OZ fast-absorbing serum Boosts nail strength & durability Si-Nails - Fast Absorbing Nail Strengthening and Hardening Serum for Nail Durability in Thin Nails, made with Cationic Hyaluronic Acid 0.08 FL OZ

**Brand:** isdin
**Price:** R1320
**Availability:** ✅ In Stock

## Summary

> 💅 Elevate your nail game—stronger, smoother, and effortlessly chic!

## Quick Answers

- **What is this?** Si-Nails - Fast Absorbing Nail Strengthening and Hardening Serum for Nail Durability in Thin Nails, made with Cationic Hyaluronic Acid 0.08 FL OZ by isdin
- **How much does it cost?** R1320 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/145823493-si-nails-fast-absorbing-nail-strengthening-and-hardening-serum-nail)

## Best For

- isdin enthusiasts

## Why This Product

- Trusted isdin brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Strengthen & Repair:** Clinically tested to reinforce brittle, weak nails for lasting durability.
- • **Fast-Absorbing Formula:** Lightweight gel that dries quickly—no sticky residue, just smooth nails.
- • **Cuticle Hydration Boost:** Enhanced cationic hyaluronic acid deeply moisturizes cuticles for healthier nail beds.
- • **Trusted Spanish Innovation:** Developed in Spain with premium ingredients, backed by thousands of 4+ star reviews.
- • **Natural Mineral & Keratin Support:** Silanediol salicylate and pistacia lentiscus gum promote essential nail minerals and keratin production.

## Overview

ISDIN Si-Nails is a fast-absorbing nail strengthening serum designed to repair and fortify thin, brittle nails. Featuring advanced cationic hyaluronic acid and natural keratin promoters, this 0.08 FL OZ gel enhances nail durability and cuticle hydration. Developed in Spain and clinically tested, it delivers visible improvements with consistent daily use, making it a must-have for professionals seeking resilient, healthy nails.

## Description

desertcart.com: ISDIN Si-Nails - Fast Absorbing Nail Strengthening and Hardening Serum for Nail Durability in Thin Nails, made with Cationic Hyaluronic Acid 0.08 FL OZ : Beauty & Personal Care

Review: 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!
Review: IMPROVE YOUR NAILS IN FIVE MINUTES A DAY - I've been using it once a day for five minutes. I've only been following this routine for 4 days, but my nails are becoming shiny and strong. I apply it to my entire nail including the cuticle and let it sit five minutes. Rub it in, then spread all over my fingers and hands. It sells nice, but mild, must be the almond oil. Previously, my nails were chipping, splitting, dry and had severe ridges. They are now much smoother and strong and shiny. I love it! And i love my nails!

## Features

- YOUR SOLUTION FOR: brittle or weak nails
- TESTED: Increases nail strength and durability while helping to repair brittle nails and reduce roughness
- TECHNOLOGY: Silanediol salicylate promotes silicon, one of the predominant minerals in the nail, while pistacia lentiscus gum promotes keratin, an essential component to strong and healthy nails. Cationic hyaluronic acid, an enhanced version of one of the most well known moisturizers in the world, which promotes cuticle moisturization.
- DEVELOPED IN: Spain

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07T6J98TT |
| Best Sellers Rank | #16,840 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #30 in Nail Strengtheners |
| Brand | ISDIN |
| Brand Name | ISDIN |
| Customer Reviews | 4.1 out of 5 stars 2,358 Reviews |
| Item Form | Gel |
| Liquid Volume | 2.5 Milliliters |
| Manufacturer | ISDIN |
| Number of Items | 1 |
| Specialty | Strengthener |
| Unit Count | 1 Count |

## Product Details

- **Brand:** ISDIN
- **Item Form:** Gel
- **Liquid Volume:** 2.5 Milliliters
- **Specialty:** Strengthener
- **Number of Items:** 1

## Images

![Si-Nails - Fast Absorbing Nail Strengthening and Hardening Serum for Nail Durability in Thin Nails, made with Cationic Hyaluronic Acid 0.08 FL OZ - Image 1](https://m.media-amazon.com/images/I/61Upc4sH6BL.jpg)

## Questions & Answers

**Q: Can I use Si-Nails on top of nail polish or gel?**
A: Si-Nails is not designed for use on top of a polish or a gel. It should always be applied directly to bare nails that are clean and dry.

**Q: How long do I need to use Si-Nails for?**
A: Results can be seen in as little as 14 days. However, it depends on the condition of your nails before starting Si-Nails nail strengthening treatment. The condition of your nails will improve with extended use.

**Q: The first time I used Si-Nails, I didn’t see any product come out. How do I start using it correctly?**
A: Before using Si-Nails for the first time, activate the click pen by pressing down on the click button at least 25 times, until the applicator is moistened. This will activate the flow and you will be able to start using Si-Nails.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing results!
*by L***F on June 4, 2024*

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!

### ⭐⭐⭐⭐⭐ IMPROVE YOUR NAILS IN FIVE MINUTES A DAY
*by J***S on December 22, 2025*

I've been using it once a day for five minutes. I've only been following this routine for 4 days, but my nails are becoming shiny and strong. I apply it to my entire nail including the cuticle and let it sit five minutes. Rub it in, then spread all over my fingers and hands. It sells nice, but mild, must be the almond oil. Previously, my nails were chipping, splitting, dry and had severe ridges. They are now much smoother and strong and shiny. I love it! And i love my nails!

### ⭐⭐⭐⭐⭐ Really truly works
*by G***F on April 11, 2025*

Life changing (at least for my nails LOL). I never leave reviews but this is too good not to share. Disclaimer: I'm a nail nut. A few years ago, at the age of 53, I decided I was very tired of brittle, flaky, dry, weak nails. I have always taken care of my nails, so the changes I was seeing were age related. I was eating healthy and exercising, was using nail polish but never gel, I moisturized etc. Nothing was helping. I used a special nail oil 6-8 times a day and no acetone and no nail polish for A YEAR and saw very little improvement. Then I discovered Dr Dana's Deep Hydrading Formula and saw an immediate improvement using their Deep Hydrating Formula...again I applied it on average 6 times a day so definitely was committed. My nails stayed short but stopped splitting and chipping...that was after about a month of use. They also have a hyaluronic serum but recommend using once a week. Then I discovered this product and went nuts with it. I bought three applicators, kept one by my desk, one in my bathroom and one in my car. I probably apply it 12 times a day LOL...certainly after any time I was my hands. It's easy. I apply a top 'coat' of the Dr Dana Formula after using the SI-NAILS. This is the magical combo. My nails are strong, flexible, and growing. This is the best they've looked in 20 years. So if you are unhinged like me and willing to go the distance, the combo of these two products changed my nails, they look 30 years younger ;)

## Frequently Bought Together

- ISDIN Si-Nails - Fast Absorbing Nail Strengthening and Hardening Serum for Nail Durability in Thin Nails, made with Cationic Hyaluronic Acid 0.08 FL OZ
- Onyx Professional Hard as Hoof Nail Strengthening Cream with Coconut Scent, Nail Growth & Conditioning Cuticle Cream Stops Splits, Chips, Cracks & Strengthens Nails, 1 oz
- OPI Repair Mode Bond Building Nail Serum | Keratin Protein Nail Strengthening Treatment | For Stronger Nails & Nail Growth

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.za/products/145823493-si-nails-fast-absorbing-nail-strengthening-and-hardening-serum-nail](https://www.desertcart.co.za/products/145823493-si-nails-fast-absorbing-nail-strengthening-and-hardening-serum-nail)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-08*