We were building a new house and I had the tile contractors use the AquaTight every where I have tile. The house is now complete, and one thing I really like about the AquaTight is that when you put water on the grout it doesn't change colors, it doesn't soak in one bit of water and it dries fast. When I mopped my kitchen floor I don't have to wait any time for the grout to dry, same with the shower floor. The shower floor dries fast and I live in a humid area. Mainly I like that it doesn't change colors or get darker when it is wet. So it truly protects, and we used it both on sanded and unsanded grout. I would definitely recommend this product and I would use it again if tiling anything. It is well worth the money because I don't think I will ever have to seal my grout again whereas with other products that is painted on you have to go back every year or so and reseal, and that isn't low cost either.