SIKA Sikaflex 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.

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

A very good sealer for the price. I will reorder today

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 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.

works as advertised