I used this to keep leaks out of my basement. One of the outside brick walls were letting in water. After reading about how brick actually absorbs water and eventually seeps through, I found this product to be what I needed. I waited for a dry spell in the summer to apply it. I read all the instructions and followed them entirely to make sure I could say without a doubt if this product lived up to it's claim. It has been almost 5 months now since I applied it to the entire north wall of my house. We have had many downpours in that time and I am happy to say this product has lived up to its reputation. I would highly recommend it to anyone who has issues like mine. It does say 7 to 10 years of protection so we will see if it lives up to that but I can say that for now, I am very happy to not see water dripping on my ceiling tile in the basement! Thank you for a product that does what it claims to do!!