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Hard Floor Care

Monday's Ask the Experts: Tile discoloration

January 23, 2012
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Monday''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 strip operations. Mix the stripper at the strongest ... — Gary Clipperton, president of National Pro Clean Corp.

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