Effects Of Sealing In Cold And Warm Weather
The problem is applying sealers to decorative concrete in extreme
temperatures. Both air and surface temperatureplay a role, but surface
temperature is typically more critical. After application, sealers undergo a
chemical reaction that causes them to cure and form a film. Temperature
plays a critical role. The best temperature range for applying sealers is 50
to 90 degrees
F. That 40-degree window is really not very big, especially when you’re working outside. This is why monitoring weather conditions
and looking at a thermometer should be mandatory before every sealer ap-application. Here’s what can happen if temperatures are too low or too high.
Low temperature – Every sealer has a minimum film forming temperature
(MFT). Most manufacturers specify 50 F minimum temperature to apply
sealers. If the temperature is at or slightly below the MFT, the chemistry of
the sealer is affected, the reaction slows down, and you get partial to no
film development. Bottom line: The sealer is weak and will not hold up very
long. If the temperature is really cold, film development stops altogether
and all you are left with is a white powder on the surface after the (solvent
or water) evaporates.
