We applied about 14 gallons of the Foundation Armor Sealant to our concrete driveway. We did as the instructions said and didn't drive on it for over 48 hours. Due to our schedules and the size of our driveway we applied it with paint rollers in the mid-to late afternoon and early evening. Early this morning we had a rain storm and the rain looked like beads of water just like you'd see on a freshly waxed car hood. The guarantee says that it's good for 8-10 years. If I'm still here I'll see.