---
product_id: 344887226
title: "Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios."
brand: "blue star"
price: "€ 47.85"
currency: EUR
in_stock: true
reviews_count: 5
category: "Blue Star"
url: https://www.desertcart.hr/products/344887226-bluestar-flexible-concrete-hairline-crack-filler-light-gray-diy-no
store_origin: HR
region: Croatia
---

# Micron-sized precision Weather-flexible formula DIY, no tools needed Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios.

**Brand:** blue star
**Price:** € 47.85
**Availability:** ✅ In Stock

## Summary

> 🛠️ Fix cracks like a pro—no tools, no hassle, just flawless concrete!

## Quick Answers

- **What is this?** Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios. by blue star
- **How much does it cost?** € 47.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/344887226-bluestar-flexible-concrete-hairline-crack-filler-light-gray-diy-no)

## Best For

- blue star enthusiasts

## Why This Product

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

## Key Features

- • **Dual Gray Shades:** Choose between Gray and Light Gray to perfectly match your concrete surfaces.
- • **All-Weather Flexibility:** Stays flexible through scorching summers and freezing winters—no more re-cracks.
- • **Proudly Made in the USA:** Quality you can trust, supporting local manufacturing.
- • **Effortless DIY Application:** No special tools or skills required—get professional results in minutes.
- • **Precision Micron-Sized Formula:** Seamlessly fills even the tiniest hairline cracks for a flawless finish.

## Overview

Bluestar Flexible Concrete Hairline Crack Filler is a 7 fl. oz. DIY solution designed to fill small cracks in concrete driveways, sidewalks, and patios. Featuring a micron-sized formula available in two shades of gray, it remains flexible in extreme temperatures to prevent future cracking. Easy to apply without special tools and proudly made in the USA.

## Description

Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios.

Review: I used this to close up some openings on my screened porch, to keep insects out. It is very easy to use, and very effective. Once applied, it retains some flexibility, so no cracking when the temperature changes. Highly recommend.
Review: It was easy to use and worked well for hairline cracks

## Features

- MICRON SIZED TO FILL HAIRLINE CRACKS
- TWO SHADES OF GRAY TO CHOOSE FROM - GRAY & LIGHT GRAY
- FORMULATED TO REMAIN FLEXIBLE IN HOT & COLD WEATHER
- DIY - Fast & Easy to Apply
- 7 Fl. Oz. MADE IN THE U.S.A.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B073ZL6GXN |
| Best Sellers Rank | #367,861 in Beauty ( See Top 100 in Beauty ) #4,945 in Permanent Hair Color |
| Item model number | HL90LG-1 |
| Manufacturer | Bluestar |
| Product Dimensions | 7.62 x 7.62 x 20.32 cm; 226.8 g |

## Product Details

- **Brand:** Blue Star
- **Item dimensions L x W x H:** 7.6 x 7.6 x 20.3 centimeters
- **Item weight:** 8 Ounces
- **Material:** Synthetic Rubber
- **Style:** Compact

## Images

![Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios. - Image 1](https://m.media-amazon.com/images/I/319UpGle4TL.jpg)
![Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios. - Image 2](https://m.media-amazon.com/images/I/51L4rGTfKiL.jpg)
![Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios. - Image 3](https://m.media-amazon.com/images/I/61Q2rOb+4GL.jpg)
![Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios. - Image 4](https://m.media-amazon.com/images/I/71zjbNoQ-TL.jpg)
![Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios. - Image 5](https://m.media-amazon.com/images/I/91AMba9Ik5L.jpg)

## Questions & Answers

**Q: Approximately how many linear feet can i expect from one bottle?**
A: Sir, There is no easy way to calculate the lineal feet of crack coverage.  other than guesstimating the the volume.  It really depends on the depth and width of your crack and Length.  However,  proper preparation of the crack is essential.  I plan on sandblasting my cracks, cleaning them out by using high pressure air or water. and then filling the void with the sealant.  If you use a pressure washer you need to make sure it is allowed to dry thoroughly before putting the sealant with them.  Filling the cracks on a warm day is a must.  Timing helps. Good luck. Michael

**Q: Can this be cleaned up with water while using?  Like using a wet sponge**
A: Yes.  Water clean up can be used.

**Q: I have a 2 tiered water fountain and the second tiered has hairline crack, can this product prevent it from breaking apart?**
A: This product will seal the crack but it will not repair it.  However our Bluestar Concrete Resurfacer may repair it since it is a concrete with added polymer for strength.   Bluestar Concrete Resurfacer is sold on Amazon also.

**Q: Will this work on tile?**
A: Yes. I’ve found it works on concrete, tile, stone and even wood. Great product.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***R on 2 August 2024*

I used this to close up some openings on my screened porch, to keep insects out. It is very easy to use, and very effective. Once applied, it retains some flexibility, so no cracking when the temperature changes. Highly recommend.

### ⭐⭐⭐⭐⭐ Review
*by S***N on 20 November 2025*

It was easy to use and worked well for hairline cracks

### ⭐⭐⭐⭐⭐ Review
*by B***B on 1 August 2023*

Their are occasions where you encounter a product where you feel compelled to provide a product review, good or bad. This is one of those products. This product is perfect as described. Those that have provided negative comments either do not understand the product or have an application not suited for this product. It is easy to apply, does just as the description says and is very easy to use. The description says for small cracks. Understand that —small cracks. I highly recommend this product if your need fits the provided description.

## Frequently Bought Together

- Bluestar Flexible Concrete Hairline Crack Filler (Light Gray), DIY - No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Sidewalks and Patios.
- Bluestar Flexible Concrete Hairline Crack Filler (Gray), DIY - No Special Tools Needed. Fill Cracks in Driveways - Patios - Sidewalks. 8 fl. oz. Bottle.
- DAP 37584 Liquid Cement Crack Filler, 1 quart, Gray

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-07*