---
product_id: 47578533
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: "€ 32.52"
currency: EUR
in_stock: true
reviews_count: 11
category: "Blue Star"
url: https://www.desertcart.hr/products/47578533-bluestar-flexible-concrete-hairline-crack-filler-light-gray-diy-no
store_origin: HR
region: Croatia
---

# Micron-sized precision filler Flexible in extreme temps DIY, no special tools 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:** € 32.52
**Availability:** ✅ In Stock

## Summary

> 🧱 Seal your cracks, not your style!

## 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?** € 32.52 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/47578533-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

- • **Made in the USA:** Quality you can trust, crafted domestically
- • **Dual Gray Shades:** Choose between Gray and Light Gray for perfect color matching
- • **Effortless DIY Application:** No mixing or special tools—just squeeze and smooth
- • **Weather-Resistant Flexibility:** Stays flexible in both scorching heat and freezing cold
- • **Precision Micron-Sized Formula:** Seamlessly fills hairline cracks for a flawless finish

## Overview

Bluestar Flexible Concrete Hairline Crack Filler is a synthetic rubber-based, water-resistant sealant designed for easy DIY repair of small concrete cracks. Its micron-sized formula ensures precise filling, while its flexibility withstands temperature extremes. Available in two gray shades, it requires no special tools and dries quickly, making it ideal for driveways, sidewalks, and patios.

## Description

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

Review: Not quickcrete - This is not quickcrete, so you should not expect it to act like it. Overall, this is a very good product for what it says it was designed for. NO PRODUCT is going to do a great job across the board for patching concrete cracks, and while it has its pros and cons, I place it above other products I have tried. This pours very well and is easy to use. I wish it was not quite as thick, it beads a little more than I want. As a tip, when you cut the nozzle I would start very small, so you can keep the size of the nozzle hole really small.
Review: Good for cracks and even pitted areas - Great product no mixing required! Just squeeze into the crack and level with putty knife as needed. Dries pretty quick so you can paint over the crack as I did. I wanted to paint my cement porch which is rather large black and it was perfect for this project.

## 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 | #79,973 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #272 in Wall Surface Repair Products |
| Brand | Blue Star |
| Brand Name | Blue Star |
| Color | Light Gray |
| Compatible Material | Concrete |
| Customer Reviews | 4.2 out of 5 stars 934 Reviews |
| Included Components | Sealant |
| Item Dimensions | 3 x 3 x 8 inches |
| Item Form | Liquid |
| Item Weight | 8 Ounces |
| Item dimensions L x W x H | 3 x 3 x 8 inches |
| Manufacturer | Bluestar |
| Material | Synthetic Rubber |
| Material Type | Synthetic Rubber |
| Model | HL90LG-1 |
| Number of Items | 1 |
| Part Number | MM-92-1 |
| Style | Compact |
| Style Name | Compact |
| Surface Recommendation | Floor |
| UPC | 866019000154 |
| Unit Count | 16.0 Ounce |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Blue Star
- **Item Weight:** 8 Ounces
- **Item dimensions L x W x H:** 3 x 3 x 8 inches
- **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/71zjbNoQ-TL.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

### ⭐⭐⭐⭐⭐ Not quickcrete
*by A***R on October 29, 2023*

This is not quickcrete, so you should not expect it to act like it. Overall, this is a very good product for what it says it was designed for. NO PRODUCT is going to do a great job across the board for patching concrete cracks, and while it has its pros and cons, I place it above other products I have tried. This pours very well and is easy to use. I wish it was not quite as thick, it beads a little more than I want. As a tip, when you cut the nozzle I would start very small, so you can keep the size of the nozzle hole really small.

### ⭐⭐⭐⭐⭐ Good for cracks and even pitted areas
*by L***T on February 2, 2025*

Great product no mixing required! Just squeeze into the crack and level with putty knife as needed. Dries pretty quick so you can paint over the crack as I did. I wanted to paint my cement porch which is rather large black and it was perfect for this project.

### ⭐⭐⭐⭐ Good to fill narrow concrete cracks
*by D***A on May 17, 2025*

A good product, I needed to fill ~1/16 inch crack in New concrete floor. Performed as advertized but required 2 applications to fill crack.

## 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: 2026-08-20*