Powerwashed my driveway and let it dry for 2 days. Afterwards, applied this sealant with a sprayer and let it dry for day. Every time it rains I like to sit and watch water just run off my driveway because this works so well. Water just beads up and doesn't penetrate concrete at all. Sprayed my foundation and patio too. I bought 5 gallons and used all of it. I Highly recommend this product.