We used the SX to seal the concrete slab on the entire first floor of an apartment complex. The day after my guys applied the product one of the contractors spilled an entire 5 gallon pail of paint onto the slab. We were shocked that the paint didn't penetrate through the surface. It was extremely easy to clean. We are very impressed with how well this product worked and how fast it worked. The customer service was awesome and we will never use another product again. Thank you Foundation Armor! The SX rocks!