I finally got the sealer down waiting for no rain days in the forecast. Seems to be going a great job on my 12 x 40 concrete slab out back to the house. Have noticed the water really beads up after a rain, so now just enjoy. Now all I have to do is just wait to see how long it will last hope as long as the product statement states it does. I think though if ever have to do it again will get the sealer that isn't as clear to cover up existing stains, etc that I couldn't pressure wash off before applying it this time. later, ronp