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Thursday's Ask the Experts: Tile discoloration

April 09, 2009
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Thursday''s Ask the Experts question from a cleaning professional on the International Custodial Advisors Network (ICAN) "Ask the Experts" page: Some tile flooring has a gray discoloration on some of the tile in some small rooms. Stripping did not take it out. Do you have a remedy to remove this discoloration?
The answer:
Two causes are most likely. First, if any of the wasted slurry (stripper plus dissolved floor finish) dries on the floor prior to removal, it will leave a gray residue. Remaining residue is often identified by the fact that it covers over the tile pattern. Standard mopping may not remove dried-on slurry. Instead, it requires re-dampening the floor and scrubbing with the machine or autoscrubber.
Second, it could be hardened sealer (normally permanent polyurethane or styrene based). Removing sealer may require up to three ... — Gary Clipperton, National Pro Clean Corp.
(719) 598-5112
www.nationalproclean.com
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