GROUT PERFECT said:
High-pressure surface cleaning will actually loosen and remove the sand in the grout through "Hydrostatic Vibration and Erosion" thus allowing the loosened sand to be removed by the suction of the extraction tool. If you find sand in your waste tank, it is most likely from your customers grout! Therefore, repeated high-pressure (500+ p.s.i.) cleaning and/or rinsing can do nothing but loosen and eventually remove the grout.
[citation needed]
GROUT PERFECT said:
REMEMBER: Square blocks of aluminum are carved into round wheels for cars and motorcycles by jets of water!
But that is upwards of 60,000 psi. Not relevant to T&G equipment.
GROUT PERFECT said:
Therefore it is our considered opinion that high pressure cleaning tools can be harmful to sand in the grout if used on a regular basis.
That sounds like a good pitch for colorseal but I'd like to see the science behind it before I accuse pretty much the whole T&G Cleaning industry of destroying grout on a daily basis. All those truckmount & spinner companies might argue this point.
GROUT PERFECT said:
It is also not necessary to use such aggressive cleaning methods after the grout is properly prepped and ColorSealed.
This part is true. A big advantage of colorseal is that you don't have to run "balls out" to clean the floor the next time around.
But colorseal will not stop a floor from getting dirty, and some people are pigs. It is useful to be able to crank up the pressure when you need it to get production. When a
good colorseal is properly applied (read prep) it will hold up fine to a spinner running higher pressure. So will the grout. Even 2000psi at the pump is only 1000psi coming out of a two nozzle spinner.
Gene, if you were getting a colorseal to peel & flake under your spinner, then it was either poor prep or a brittle, hard, inferior colorseal. You know how hard it is to blast gum off of concrete vs hard soil. Same thing with coatings. A flexible coating will hold up better to impact cleaning.