Polyurethane Concrete Crack Filler Self-Leveling Cement Repair Seal | Adhesive Construction Sealer for Driveway, Adhesive Sealer for Outdoor Construction Sealing Cracks, Gray 10.5 fl. oz, 3Pack

I bought this and a tub of concrete patch to fix surface cracks in my driveway. This self leveling sealant worked great. It filled the cracks and remained level. It adhered to the driveway (I power washed the cracks first). 1 tube went a long way. This is a good product.

I needed to replace my old fiberboard driveway expansion joints and wanted to go with a cheaper Urethane type crack filler. This did the trick. You MUST use a backer underneath this! It's very runny and will flow and self-level. Without a backer of some type (I used the coiled foam you can buy on here) it will flow down into your cracks and you'd need gallons of this -not a few tubes- to get the job done. Use a foam backer that gives a tight fit in the gap and make sure it is level, and not too deep or you will use more of this than you should to bring the gap up to level. Only gripe I had was this this stuff stays tacky for days and it will attract dust and grit and look dirty pretty fast. It does stay pliable, which is good, it doesn't completely harden rock solid. If you have a large job you might be better off buying. filler material by the bucket for cost savings.

I understand some of these other reviews saying it's hard to get this started. The doesn't even say cut the top off and puncture the seal. But once you get that plunger moving, it flows fine. I actually broke one caulk gun trying to get it to move. Need a good solid caulking gun and possibly another way to get that plunger moving.

Stay clear of this product. It has been seven days since I used it as directions stated and it has not dried or set up. I returned it and do not recommend.

Keep it cool or it will come out like soup

Difficult to dispense from tube. It stayed tacky for days. It has actually not firmed up really at all. It did dry from being tacky. However its sticky and attracts dirt. Difficult to sweep over. Just to tacky.

Good product and good delivery

UPDATE: I had gone beyond the return window when my batch of tubes proved to be seized up and worthless, BUT the seller reached out anyway and gave me a full refund. Went from 1 star to 4. ------ I bought these as part of a project to repair a crack in my house concrete pad. First I needed to inject (expensive) 2-part epoxy glue with bolts every few inches along it and then I planned to use this product to fully seal the top of the crack. I bought this a few weeks early and kept it on hand so that when the prep work and epoxy glue had fully cured, I'd be ready to go. When I punctured the inside foil seal on the first tube, I could tell the product was semi-liquid. BUT when I started working the trigger on the gun, the inner end would not budge. I thought, "oh well -- good thing I've got 3 tubes!" Not so fast. Each one of them was frozen in the tube. I took a rubber mallet to the back angled plunger, and then a heavy hammer, but those tubes were totally seized up. Unfortunately, I also bent the plunger and the sheet-metal trigger trying to get the product out. Good thing caulk guns are relatively cheap! I'm past the 30 day return window and so I've wasted my $30 plus the gun. Frustrating!