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

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.

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.

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.

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.

This works great at sealing cracks in my patio, but it is much lighter than my concrete. I tried putting some polymeric sand I had on top of it to make it blend in better, but the filler set up so fast it would not stick.

Does exactly what I was hoping it would! Had several hairline cracks in my patio, and applied as directed,cracks are no more!

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.

I used this to fill hairline cracks on my front and back porches. I applied this in the summer of 2024 and it's still holding up. It's not the same color as the rest of the porch, but the crack is filled.