Need to take care of this myself. Thanks for the link, I'll check them out.
Did you get the color sealing done and how has it held up?
We did in the areas that needed it. These guys came in and fixed the entirely shitty job done by the builder subs on everything that was tile or touched tile in our house, which is why our per sq ft charge was higher than average.
I’d have no problem bringing them back in for just a cleaning in a couple of years.