We used Sani-Tred in our basement with great success. About four years ago we started getting seepage through some of the poured concrete walls in our finished basement whenever it rained hard and long. I had to tear out the finished sheetrock and of course the drop ceiling came down with them – what a mess and a lot of work. Eventually the leaking got so bad that there was one spot where it looked like a drinking fountain coming through the wall! After a lot of research we decided to try to fix it with Sani-Tred. Anyone who says they can waterproof a basement from the outside is lying. You cannot get under the floor. You cannot get rid of the water in saturated soil if the storm sewers can’t handle the flow. It really is that simple. Drilling holes to let more water in and adding a sump pump seemed like a really bad idea; why would I want to let more water into the basement? So, we spent about $1200 on Sani-Tred Permaflex and LRB/TAV. We also bought one of those propane tank flame throwers to dry the walls. The preparation is key to success with this product. Do not try to take short cuts, and if you do, and it doesn’t work, don’t come back here and blame the product. It is a lot of work. We applied the Permaflex with a roller after trimming around windows and corners with a brush, just like you would if you were painting. It is thick and messy and a lot of work. Then we used the LRB/TAV in the corners, on any cracks, and at the floor/wall seam (tell me again how you seal that seam from the outside – you can’t). Then another coating of Permaflex over everything. We did all the walls and the entire floor. That is the only way to make sure the leak won’t just move to a different spot. The next time we had a really heavy rain, we noticed 2 or 3 pinhole leaks. After closer inspection, we noticed that the pinholes were everywhere. So, we applied another coating paying special attention to the pinholes. Eventually we got it all covered with no more pinholes anywhere. The basement has been completely dry ever since. That was over three years ago. I am going to finish the basement with sheetrock, moulding, and carpet again this spring. I waited 3 years just to make sure the leaks wouldn’t come back. Honestly, I am amazed at how well this product worked. I even thought about going into the basement waterproofing business, because it is so amazing, until I remembered how much work it was to use this product correctly! We used the gray color but we didn’t use any Xylene to thin it, just for cleanup. Without the xylene there was no odor while applying the product and there has been no odor of any kind since. Maybe it is the xylene that is causing that “cat urine smell” people are writing about? We did have to clean off the yellowish oil that appears about a week or so after the stuff cures, but never again after that. I am shocked at the vitriol you see aimed at this product on some websites. Almost all of the naysayers make their living trying to waterproof basements from the outside and almost none of them have ever actually used this product, but they hate it. I wonder why? If you prepare the walls and floor the way Sani-Tred says you have to, rather than trying to take shortcuts, and if you apply multiple coats to the entire basement – again, the way Sani-Tred says to do it – then this product will work. It did for us. But it is a lot of manual labor. If you try to take shortcuts or only do a partial job, you will probably get bad results, but don’t blame the product. I hope this info helps someone do it right like my wife and I did.