---
product_id: 47308618
title: "Bluestar Flexible Concrete Hairline Crack Filler (Gray), DIY - No Special Tools Needed. Fill Cracks in Driveways - Patios - Sidewalks. 8 fl. oz. Bottle."
brand: "blue star"
price: "26532CFA"
currency: XOF
in_stock: true
reviews_count: 9
category: "Blue Star"
url: https://www.desertcart.sn/products/47308618-bluestar-flexible-concrete-hairline-crack-filler-gray-diy-no-special
store_origin: SN
region: Senegal
---

# Micron-sized precision fill Flexible in extreme temps DIY, no special tools Bluestar Flexible Concrete Hairline Crack Filler (Gray), DIY - No Special Tools Needed. Fill Cracks in Driveways - Patios - Sidewalks. 8 fl. oz. Bottle.

**Brand:** blue star
**Price:** 26532CFA
**Availability:** ✅ In Stock

## Summary

> 🧱 Seal the cracks, not your style—stay flawless, stay flexible!

## Quick Answers

- **What is this?** Bluestar Flexible Concrete Hairline Crack Filler (Gray), DIY - No Special Tools Needed. Fill Cracks in Driveways - Patios - Sidewalks. 8 fl. oz. Bottle. by blue star
- **How much does it cost?** 26532CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/47308618-bluestar-flexible-concrete-hairline-crack-filler-gray-diy-no-special)

## 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

- • **Seals & Protects:** Waterproof barrier prevents moisture damage and crack expansion, extending concrete life.
- • **Perfect Gray Match:** Blends seamlessly with standard concrete surfaces for a professional, clean look.
- • **All-Weather Flexibility:** Stays flexible through scorching summers and freezing winters—no cracking or peeling.
- • **DIY-Friendly Application:** No special tools needed—pour, fill, and seal in minutes with zero hassle.
- • **Precision Micron-Sized Formula:** Effortlessly fills even the tiniest hairline cracks for a flawless finish.

## Overview

Bluestar Flexible Concrete Hairline Crack Filler is a precision-engineered, waterproof acrylic-polyurethane formula designed to fill and seal hairline cracks in concrete surfaces. Its micron-sized particles ensure deep penetration, while its flexible composition withstands temperature extremes, preventing further damage. Easy to apply without special tools, this 8 fl. oz. gray filler blends seamlessly with concrete, making it the go-to solution for durable, professional-grade crack repair.

## Description

Bluestar FLEXIBLE Concrete Hairline Crack Filler (Gray), DIY- No Special Tools Needed. Fill Small Cracks in Concrete Driveways, Patios and other Concrete Surfaces. 16 fl. oz. Bottle.

Review: Worked as advertised - Had looked around at multiple different crack filler products for some hairline cracks in my garage floor. The cracks are near the door opening and frequently get wet and have been slowly expanding over the past few years when the moisture gets in them. I eventually settled on this product as it seemed to be the most relevant to my issue and was reasonably priced. The application process was pretty slick, the product is fairly thin and easily worked its way into the hairline cracks in the garage floor. Clean up was quick and easy and the product was easy to work with throughout the process. It dries/sets-up fairly quickly and the color matched my standard smooth finish concrete floor well. 24 hours after application it looks very nice and seems to have filled in the hairline cracks and sealed the surface. Once it gets a little garage dirt on it, it probably won't even be noticeable. Now just have to wait and see how it holds up over the winter months with the melting snow and wet floors and temperature changes; but it certainly appears to have filled the cracks and seems like it is sealed up pretty well.
Review: Easy to apply, filled in narrow cracks quite well. - This was easy to use and easily filled in some fine pavement cracks I had. It pours easily, not as runny as water, but more like cream. So far, I'm pleased.

## Features

- MICRON SIZED TO FILL HAIRLINE CRACKS
- FORMULATED TO REMAIN FLEXIBLE IN HOT & COLD WEATHER
- DIY - Fast & Easy to Apply Seals Cracks to Prevent Further Damage
- 8 Fl. Oz. MADE IN THE U.S.A.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B073ZM4TWT |
| Best Sellers Rank | #224,880 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #538 in Wall Surface Repair Products |
| Brand | Blue Star |
| Color | Gray |
| Date First Available | July 17, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 8 ounces |
| Item dimensions L x W x H | 3 x 3 x 8 inches |
| Item model number | HL90GR-1 |
| Manufacturer | Bluestar |
| Material | Acrylic, Polyurethane |
| Number of Items | 1 |
| Product Dimensions | 3 x 3 x 8 inches |
| Style | Compact |
| Surface Recommendation | Floor |
| UPC | 866019000147 |
| Unit Count | 16.0 Ounce |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Blue Star
- **Item Weight:** 8 Ounces
- **Item dimensions L x W x H:** 3 x 3 x 8 inches
- **Material:** Acrylic, Polyurethane
- **Style:** Compact

## Images

![Bluestar Flexible Concrete Hairline Crack Filler (Gray), DIY - No Special Tools Needed. Fill Cracks in Driveways - Patios - Sidewalks. 8 fl. oz. Bottle. - Image 1](https://m.media-amazon.com/images/I/71lflyCRx2L.jpg)

## Questions & Answers

**Q: Will it work on small cracks on concrete garden statues?**
A: Not sure about statues. Tried it on concrete floor and it is a darker color and sets like a rubbery texture. Not impressed.

**Q: Would this work to repair a crack in an ‘egg’ bbq?**
A: I don't understand the question.  As far as I know, it designed to be used on horizontal cracks in cement and blacktop areas.  I used it on a cement slab in a condo before I installed carpet.  It worked great.

**Q: Can it be stained and sealed with the rest of concrete?**
A: Our crack filler products will not accept stain.  It will accept paint.  We recommend a latex based paint.

**Q: How to do you clean excess rubber on pavement?**
A: The easiest way to remove excess is to score a line between the good and the excess and use a wire brush to remove the filler outside of the crack.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked as advertised
*by N***P on November 10, 2023*

Had looked around at multiple different crack filler products for some hairline cracks in my garage floor. The cracks are near the door opening and frequently get wet and have been slowly expanding over the past few years when the moisture gets in them. I eventually settled on this product as it seemed to be the most relevant to my issue and was reasonably priced. The application process was pretty slick, the product is fairly thin and easily worked its way into the hairline cracks in the garage floor. Clean up was quick and easy and the product was easy to work with throughout the process. It dries/sets-up fairly quickly and the color matched my standard smooth finish concrete floor well. 24 hours after application it looks very nice and seems to have filled in the hairline cracks and sealed the surface. Once it gets a little garage dirt on it, it probably won't even be noticeable. Now just have to wait and see how it holds up over the winter months with the melting snow and wet floors and temperature changes; but it certainly appears to have filled the cracks and seems like it is sealed up pretty well.

### ⭐⭐⭐⭐⭐ Easy to apply, filled in narrow cracks quite well.
*by J***O on April 23, 2025*

This was easy to use and easily filled in some fine pavement cracks I had. It pours easily, not as runny as water, but more like cream. So far, I'm pleased.

### ⭐⭐⭐⭐ Good but you need more than you think
*by B***L on January 3, 2024*

I used it on hairline cracks on a fairly level concrete patio/porch. Pros: 1) It was very easy to apply. It flowed well, didn't hurt my hand like a caulk gun does, and didn't clog the bottle. I felt like I was able to use the entire contents without leaving a lot stuck inside the bottle. 2) It creates a flexible seal. Flexibility is important if you have a clay foundation so that continued swelling or shrinking of the ground won't cause things to crack again as quickly. Cons: 1) Know that the color probably will not match, so the floor will look worse with all cracks in a different color on the surface, but they will be sealed. Product is supposed to be paintable, so painting is an option, but I haven't tried it yet. 2) You need multiple applications and will use more than you think. If I use this again, I will attempt to do multiple applications over several days. After the first application, I thought it was all good, but by the next day the product had seeped down far enough even into the hairline cracks that the cracks were not full. I had to go over the cracks again and a third time the day after that. My advice is to get more than you need and don't assume the project is finished until several days later. 3) It's pretty expensive. I know this is for hairline cracks only, but I had hoped that a small bottle would go farther than it did. Overall: I'd still use it but will try to have more realistic expectations. I don't know how it compares to other self-leveling products, but the ease of application was good. Time will tell if the quality of seal is good, too.

## Frequently Bought Together

- Bluestar Flexible Concrete Hairline Crack Filler (Gray), DIY - No Special Tools Needed. Fill Cracks in Driveways - Patios - Sidewalks. 8 fl. oz. Bottle.
- 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 Crack Filler (Gray), DIY - No Special Tools Needed, Fill Cracks in Concrete Driveways, Sidewalks, Patios, Garage and Basement Floors. 16 fl. oz. Bottle.

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-08*