--- product_id: 6343827 title: "Invisible Flex Nail Hardener, Clear Gel Top Coat (05 fl oz)" brand: "nutra nail" price: "$21.90" currency: USD in_stock: true reviews_count: 13 category: "Nutra Nail" url: https://www.desertcart.us/products/6343827-invisible-flex-nail-hardener-clear-gel-top-coat-05-fl store_origin: US region: United States of America --- # Mineral-infused nail health boost Break-resistant flexible shield 2-in-1 base & top coat protection Invisible Flex Nail Hardener, Clear Gel Top Coat (05 fl oz) **Brand:** nutra nail **Price:** $21.90 **Availability:** ✅ In Stock ## Summary > 💅 Strength meets invisibility — your nails’ new secret weapon! ## Quick Answers - **What is this?** Invisible Flex Nail Hardener, Clear Gel Top Coat (05 fl oz) by nutra nail - **How much does it cost?** $21.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/6343827-invisible-flex-nail-hardener-clear-gel-top-coat-05-fl) ## Best For - nutra nail enthusiasts ## Why This Product - Trusted nutra nail brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Nourishing Formula:** Infused with essential minerals to repair, restore, and promote healthier nails over time. - • **Dual-Action Protection:** Use as a base coat and top coat for maximum reinforcement and lasting shine. - • **Effortless Application:** Smooth, fast-drying gel with a precision brush for full edge-to-edge coverage. - • **Instant Strength Boost:** Hardens fragile nails on contact to prevent splitting, peeling, and tearing. - • **Invisible Armor for Nails:** Clear, breathable gel that delivers chip-free, flexible strength without bulk. ## Overview Nutra Nail Invisible Flex Nail Hardener is a clear, breathable gel top coat designed to protect and strengthen weak, brittle nails. Its flexible, break-resistant formula acts as an invisible shield that prevents chipping and splitting while nourishing nails with essential minerals. This 2-in-1 treatment can be applied as both a base and top coat, delivering instant reinforcement and long-term health benefits with a lightweight, fast-drying finish. ## Description desertcart.com : Nutra Nail Invisible Flex Nail Hardener, Clear Gel Top Coat (05 fl oz) | Instant protective Coat & Restorative Shield for Brittle, Damaged Nails, Flexible Hold : Nail Strengthening Products : Beauty & Personal Care Review: Strong and Holding - This is a life saver. Have been packing for a move. It has been rough on my nails. Nails still long and very strong. Review: The Secret Weapon for Strong, Healthy Nails - If you're like me and have struggled with weak, brittle nails, then the Nail Invisible Flex Hardener is a game-changer you need in your beauty arsenal. This product promises to strengthen nails while remaining virtually undetectable, and let me tell you, it delivers on that promise. I've been using this hardener for a few weeks now, and the results speak for themselves. Not only have my nails become noticeably stronger and less prone to breakage, but they also look healthier and more polished overall. What sets this product apart is its invisible formula, which means you can wear it alone for a natural look or as a base coat under your favorite nail polish without any added bulk or texture. Application is a breeze thanks to the smooth, fast-drying formula. With just a few strokes, you can achieve a thin, even layer that provides instant reinforcement to your nails. Plus, the convenient brush applicator makes it easy to reach every corner and edge for thorough coverage. ## Features - Break-Resistant, Flexible Shield­ - This clear polish Flex Hardener is a breathable acrylic layer that coats nails with transparent armor for chip-free gel shine. Lightweight but mighty, this treatment creates an extra-strong shield that absorbs nail trauma from everyday activities - Instant Protection for Weak Nails - Nutra Nail Invisible Flex hardener is designed for those with thin nails that break easily. This fragile nail treatment immediately hardens nails, and prevents them from splitting, tearing, peeling, and more - Improves Nail Health - Our formula is more than just a strengthener! Nutra Nail Invisible Flex Hardener is infused with minerals that play a key role in nail health. So, while our professional nail armor defends against daily damage, it supplies crucial nutrients that repair, restore, and protect nails - 2-in-1 Protective Layer - Reinforce your nail health by using this nail hardener to support brittle, damaged nails or increase the strength of healthy nails; apply as a base coat for standard protection and follow up withthe clear lacquer top coat for an extra strengthening coat - How to Use - Apply to clean, dry nails from base to tip, and over edges. Let nails dry and repeat. If using with color polish, apply flex-shield nail hardener as a base coat and top coat ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00CXK3ZFM | | Best Sellers Rank | #178,493 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #211 in Nail Strengtheners | | Brand | Nutra Nail | | Brand Name | Nutra Nail | | Customer Reviews | 4.4 out of 5 stars 331 Reviews | | Global Trade Identification Number | 30018515124495 | | Item Form | Gel | | Item Weight | 58 g | | Liquid Volume | 0.5 fluid ounces | | Manufacturer | EMCW9 | | Manufacturer Part Number | 30018515124495 | | Model Number | 12449 | | Number of Items | 1 | | Size | 0.5 Fl Oz (Pack of 1) | | Specialty | Repair,Damaged,Strengthener,Hardener | | UPC | 018515124494 787734562058 773490442475 | ## Product Details - **Brand:** Nutra Nail - **Item Form:** Gel - **Item Weight:** 58 Grams - **Liquid Volume:** 0.5 Fluid Ounces - **Specialty:** Repair,Damaged,Strengthener,Hardener ## Images ![Invisible Flex Nail Hardener, Clear Gel Top Coat (05 fl oz) - Image 1](https://m.media-amazon.com/images/I/71d4u3wisOL.jpg) ## Questions & Answers **Q: is this item absorbed by the nail?** A: Anything you put on your nail is likely "absorbed" ! I've used Nutranail Flex-Shield Nail Hardener over a year without any problems/side effects.! I'm super sensitive to a wide range of ingredients with NO PROBLEMS. It is the BEST nail hardener on the market!!!! I use it as a BASE COAT & TOP COAT. MY MANICURES LAST EASILY UP TO 14 DAYS!!!!!!!!!!!!!!!!!!!!!!! **Q: Can finger nail polish remover take it off?** A: I think so. I don't remove it from my nails, I just polish over it **Q: Can you use it as a top coat** A: Yes, I always use two thin coats on top of my nail polish and I can usually go at least one week between polishing. **Q: Does this have any shine or color to it? It’s for my husband’s nails, and I don’t think he would appreciate a nail polish look.** A: It doesn't have any color there is a slight shine ## Customer Reviews ### ⭐⭐⭐⭐⭐ Strong and Holding *by R***S on March 29, 2026* This is a life saver. Have been packing for a move. It has been rough on my nails. Nails still long and very strong. ### ⭐⭐⭐⭐⭐ The Secret Weapon for Strong, Healthy Nails *by T***H on April 19, 2024* If you're like me and have struggled with weak, brittle nails, then the Nail Invisible Flex Hardener is a game-changer you need in your beauty arsenal. This product promises to strengthen nails while remaining virtually undetectable, and let me tell you, it delivers on that promise. I've been using this hardener for a few weeks now, and the results speak for themselves. Not only have my nails become noticeably stronger and less prone to breakage, but they also look healthier and more polished overall. What sets this product apart is its invisible formula, which means you can wear it alone for a natural look or as a base coat under your favorite nail polish without any added bulk or texture. Application is a breeze thanks to the smooth, fast-drying formula. With just a few strokes, you can achieve a thin, even layer that provides instant reinforcement to your nails. Plus, the convenient brush applicator makes it easy to reach every corner and edge for thorough coverage. ### ⭐⭐⭐⭐⭐ Great for my split nails *by C***N on June 9, 2025* I'm an older lady, age 64. All of my fingernails have vertical ridges on them. The dermatologist says this is a normal sign of aging but I hate it because my left middle nail splits on occasion. This product goes over the split clearly and helps to harden that area so it can grow out without snagging on everything. ## Frequently Bought Together - Nutra Nail Invisible Flex Hardener – Instant Protective & Restorative Clear Gel Top Coat Shield for Brittle, Damaged Nails - 0.5 Fl Oz - Nutra Nail Triple Power Gel Treatment – Instant 3-in-1 Protective, Nourishing & Strengthening Lacquer for Weak Nails - Onyx Professional Hard as Hoof Nail Strengthening Cream with Coconut Scent, Nail Growth & Conditioning Cuticle Cream Stops Splits, Chips, Cracks & Strengthens Nails, 1 oz --- ## 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.us/products/6343827-invisible-flex-nail-hardener-clear-gel-top-coat-05-fl](https://www.desertcart.us/products/6343827-invisible-flex-nail-hardener-clear-gel-top-coat-05-fl) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-08*