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Saturday, November 22, 2014

Question

Is it okay to strip and recoat vinyl floors at 60 degrees or lower?


Answer

Stripping at or around 60 degrees poses no problem, but whether you can successfully apply finish at that temperature, depends on what the coatings industry calls the Minimum Film Formation Temperature (MFFT) or Minimum Filming Temperature (MFT) for the finish you are using. This will vary from product to product and there should be some information on the label as to the temperature below which the product will not form a durable film and adhere properly. A concrete slab can be 10 to 15 degrees colder than the inside air, especially in the North, and that means finishes stored in cold rooms (or trucks) may be below the MFFT before they are applied.
To be safe, check the manufacturer for the MFFT, store products well above that temperature, and apply only to floors above that temperature. While the product formulation may allow for a lower MFFT, 60 degrees F. is a good number to work with.
Frozen finishes will not film correctly either and should be discarded.
For a technical look at film formation check:
www.initium.demon.co.uk/filmform.htm
Lynn E. Krafft, ICAN/ATEX Associate Editor
lekrafft@juno.com