I use this product to seal/waterproof the concrete (inner) sides of the sewer at the bottom of my driveway and on the ends of various pieces of pressure treated wood in my backyard (like the tops of fence boards) and am pretty much satisfied with it. It's, of course, very easy to apply and goes on a milky color and dries clear, making it easier to tell where you've just applied it in poorly lit areas. And, unlike many types of concrete/masonary sealers, one can apply this Thompson's product in direct sunlight. Just be sure to first use their cleaner to remove all the grease, fungi, etc on the object you want to seal b4 applying the waterproofer.