We just applied the product with a sprayer. It was very easy to apply and it soaked right in. It started drying right away and it did not cause any change in color. So far I am pleased with the results and I guess time will tell how well this product will protect my driveway. 5 gallon was adequate to do 2 coats on a 2 car driveway. My driveway faces north and I have certain areas of the driveway that gets no sunshine. I wanted to protect those areas against spalling and cracking. My driveway is just about 3 months old.