Bluestar Flexible Concrete Crack Filler (Light Gray)

Works really good. Blends in pretty well. Easy to sue. How much you need depends on the length and how deep. Get a 10 OZ tube and use a dispensing gun. Much more consistent with the bead than hand squeeze.

I have used this product and its companion products before. This time I needed the light grey color to match a crack I wanted to fill on a concrete floor prior to installing flooring. Once again it was very easy to apply in the smaller areas, and once a base fill was used, it worked equally well on the wider and deeper cracks. It dries quickly and stays just flexible enough to allow for expansion and contraction. I have now used it for both interior or exterior cracks and highly recommend it.

Nice product, did the job filling hairline cracks in my patio concrete. Dried to a shade that closely matches the existing concrete. I used a craft brush to paint the mix into the lines and then wiped with a towel. Came out great.

This product is amazing. I tried to cut the tip in a diagonal, as one commenter recommended, did not work, instead I ended up with a larger opening needed. I applied a thicker than needed amount on my 1/8" to hairline crack , 2ft long, and was able to remove the excess using a wet, with water, cloth, cleaning continuously, using about 6 cloths for about 15min. Water is not recommended, the product is not to be applied if rain is in the forecast within 24hrs, and cleaning for 15 min instead of 3min may have been unnecessary, but I am over the top meticulous as this is a fairly new driveway, not sealed yet, and would rather have a 'crack fill fail' over a stain. Because I used water, there were a couple of places to re touch and went back to do this, also not recommended. The temp now being 84 F with the touch up, using a toothpick, I found the product sets up in a very short time, 4min? so, if you are a novice, inexperienced at this as I am, do the project when it is cool for enough time to clean up. I am lucky as this lt grey matched my newer driveway and as it dries to a product the same as the texture of concrete, I can not find where the crack was. The surface of my driveway is brushed which helps to camouflage fixed cracks. As I broke some rules in application, I half expect this to take, but if it does, this will be my method. Update: Almost a year has passed, after snow, much rain, ice, still looks great.

Used to seal up some concrete cracks. But it seems I've had to reapply a few times because it kept cracking in the Florida sun.

this material works great, I used it to seal 3 separate hairline cracks in my driveway and patio. These cracks totaled up to about 50 feet of length and varied between 1/16th inch to perhaps 1/8" width. Initially I figured I'd run out of this stuff long before I finished all I wanted to do, to my surprise I had about 1/3 of the bottle remaining after I completed filling all the cracks I could find. The material has a consistency of thick glue or perhaps honey, it fills the cracks nicely and sets up very well in 12 to 24 hrs. I used it in warm conditions, 80-90 degrees. I could not be happier it is very tough when it sets up, rain, auto traffic, etc does not seem to bother it. I used the light grey and its a little lighter than my cement, I dont' care about that. But there are two colors to chose from, so think about it. Super stuff for sure, it fills small hairline cracks beautifully, it adheres to the crack very tightly and looks to me like it will seal water out very well and prevent additional chipping and cracking. Cheers !

Thus stuff goes on liquid but dries to concrete. Easy to use. Love it, and I had alot of small holes to fill from a tack strip. Just don't overfill holes, if too deep ,fill twice.

This product is ridiculous. "Concrete filler" my foot. It's liquid rubber. That's all that it is. It doesn't even adhere to the concrete. You pour it in, you wait for it to dry and the next day, when you go to smooth off the excess, and your tool just pulls it all out of the crack. So you try sharper tools, same result. In the end, just to see how bad it is...you go to another section and find out it lifts right out with your fingers. This product is absolute nonsense. I know better than to try and take shortcuts, but I had a lot of work to do and needed to catch a break. In the end, it cost me more time...because now I have to go back and do it all over. Tomorrow, I mix some proper concrete, work it into these cracks and fix it right...like a man. Don't buy this product. It's garbage.