Cement grout is cleaned with alkaline cleaner, not acid
Cement grout is porous and can absorb a stain. Owners often seal it. Epoxy grout, the FAQ says, is virtually as stain-proof as the tile. Stain removal on cement grout is compared to laundry: the cleaner has to match the stain.
Acid versus alkaline
Sand in the grout is largely untouched by cleaners. Cement is alkaline and is dissolved by acids. Vinegar and grout react. The FAQ prefers an alkaline cleaner, and it names ordinary alkaline household cleaners plus tile-shop products and enzyme cleaners. Oil or wax cleaners leave a film in the joint. Alkaline cleaner that is not rinsed leaves a sticky soap film that holds dirt.
Lift the dirt out
The preferred method is to apply cleaner and vacuum the dirty water, then rinse and vacuum again. That lifts dirt and leftover soap out of the joint instead of pushing them deeper. The tile itself can often be cleaned with water because it does not hold the stain the way the joint does.
Source
Fetched 2026-10-11 from Tile Council cleaning grout FAQ. The sentences above follow that page. They are not a contractor promise.
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