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Friday, December 19, 2014

Question

I have VCT to clean and it has a yellow discoloration in the traffic lanes. How can we get the yellowing out and what causes it? How do we stop it?


Answer

To start, I would recommend a full strip of the finish in those areas showing the discoloration to see if it is in the finish or in the tile itself. If it is in the finish, you will have to locate the source, which may be asphalt seal from the parking lot or walkway. Or, it may be due to new finish sealing in soils ground into the surface in those sections most heavily trafficked.
These problems can be averted by using matting and by proper refinishing of only completely clean surfaces.
If the tile itself has the yellowing, something has migrated into it from rubber-backed matting or possibly some activity that took place before a finish was applied. In this case, your only solution may be tile replacement followed by correct finishing and maintenance.
Personally, Iím guessing the placement of clean finish on dirty, damaged finish is the culprit, but without being there, I canít be certain.

Lynn E. Krafft, ICAN/ATEX Editor
lekrafft@juno.com