"Our basement is finished, but with an exposed concrete floor. We have 8 cats, and a couple of them had decided to make it their mission in life to regularly "mark" all around the perimeters of both rooms. I tried every product on the market, but nothing took the smell out of the concrete. The little darlings just kept marking the same spots, and the basement smelled horrible -- that is until I discovered this Earth Care product for concrete. I sprinkled a generous amount on every squirt spot and left it for a day or so. Then I vacuumed it all up with the shop-vac, and NO MORE BAD SMELL!!! Not only did the smell vanish within a few minutes of applying the product, but it's been months and the smell is still gone! No more inappropriate squirting! It's all in the litterboxes! It eliminated both the smell and whatever it is that makes cats mark certain spots repeatedly. I also really like that the product is completely non-toxic (even if eaten, according to the label). Fantastic product -- HIGHLY RECOMMEND!!!"