SIKASikaflex Crack Flex Sealant, Gray, High-Performance Textured Polyurethane, Self-Leveling, Waterproof Sealant for Horizontal Cracks Up to 1 in Wide, 10.1 fl oz,

I applied 10 tubes of this to cracks in a concrete driveway on a warm day, and was pleased with the ease of use and its self-leveling qualities. As others have said, it will sink into deep cracks and isn't inexpensive, so keep that in mind. I happened to have one tube each of similar products, so was able to compare all three in the same situation- this product was clearly the best of the three. My application was recent, so I can't speak to long term durability. Bottom line us I'm glad I spent a little more for a product that so far has been everything it promised to be.

Best concrete crack filler on the market! I had a professional concrete repair crew lift my driveway a few inches after water washed away the dirt underneath it. They repaired the cracks using this sealer and guaranteed it for 5–years. It expanded and contracted with the weather and provides excellent adhesion to the concrete. So I had sidewalks with cracks and I ordered this to fill them. It’s miraculous stuff. It blends well with the concrete and looks professional. It’s self leveling which provides a smooth finish.

Full disclaimer know what you're doing with this sealant it's not that it doesn't work it's only that if the crack is big it will settle down in it there is other sealants crack fix type that do not drop down into the crack. This is a self-leveling kind that wants to seep down into the crack. They make it seem like it is the perfect concrete fix and it is I guess as long as you have a backer in the crack to stop the seepage of this. Just know what you're buying and what you're getting into. After the first 10 of these I bought a different version which has no settling that worked much better for sealing my concrete driveway I would recommend the other version of this brand that is for concrete cracks and has no settling at all.

this stuff is everything that claims to be, but you have to know what you're doing.deep cracks must be filled with foam backing, you can buy spools of corded foam (i just recycle that white soft packing foam from other packaging of other products.I recommend at first applying thin ¼ or ⅓ of an inch layer and waiting 5 or 10 min for things to level / settle and then applying another layer.This will help you understand what you're dealing with and how much to use.always put applicator down over a paper plate or an unfilled crack, it will WILL dispense an ounce or so after you release the trigger.when you're done (while it is still wet) lay down an ⅛ inch layer of sand on top of the fresh sealant.This will do three things:Help the blend in with the adjacent cement.Help the sealant last years longer.Stop it from sticking to shoes if anybody steps on it before it dries.after a few days just sweep the loose sand away

I have a gap about 1" wide between my garage apron and the concrete slab adjacent to it. It looked like it had been filled with something black, maybe tar and it broke up when I ran compressed air over it to clean it up. Certainly not flexible material at this point and already had cracks in it.I had read about this type of "self-leveling" product (which has been used elsewhere in my neighborhood) and decided to give it a try. Although I had some backing, I wasn't calculate how much I would need, so I started with 3 tubes. That got me about 2/3 of the way across the apron - a little better than expected. Not bad for a 1" gap. (Also the slab is tipped 1/2" - 3/4" relative to the apron across it's width so that the edges cross in the middle; water will have to follow the gap ~ halfway to flow onto the slab.)I went to order a couple tubes to finish and in a couple of weeks the price had doubled from $10/tube. Turns out the local Home Depot carries it for around $10.I hadn't worked with this self-leveling product before and it really does flow even more easily than I expected which means your prep has to be pretty good. Although it says it can be "tooled", I had minimal success with that (after 20-30 minutes) - maybe if you work it immediately. I found I had to lay a little less than I thought was needed and go back over it a few minutes to get the level I wanted. There is a little "knack" to using it well, but I got it after using 3 tubes,One thing I did find which is illustarted in the image, when I went back a day later to continue filling the gap, the new material didn't quite blend seamlessly with the day-old material. (See red arrow, and dashed line which traces part of the "seam".) The image exagerates it a bit, but as a perfectionist I notice it. The difefference in height is like 1/16" ... not much frankly. Overall it looks real good to me given the alignment issues.Been in place a few weeks. Interested to see how it fairs over the Western Pennsylvania Winter.

Love this stuff!!...little pricey but worth it!!Fills the cracks and looks great!!Easy to use...follow the directions.

I applied this product in the driveway during summer, it held on really well for 2 to 3 months and then it started to crack when winters approached. I used bake rods when necessary and thickness of the product was approximately half inch.