Thick coats of sealer or a buildup of coats applied over the years will cause moisture to become entrapped under the sealer and in time the sealer debonds from the concrete.
Concrete sealer white haze.
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The sealer turned white every time it got wet.
Efflorescence is caused by vapor migrating through the slab bringing soluble salts to the surface of the concrete.
Moisture vapor pressure contamination or over application of the sealer can cause this problem.
Sealer turned a white or cloudy color a white or cloudy color is caused by moisture that is trapped inside the sealer.
This happens to sealers that are not breathable or over applied.
There are a number of reasons this could have occurred.
If your sealed surface turned hazy or white it s most likely due to excessive moisture.
Today the current voc compliant sealer gives off less than 400 grams per liter.
The sealer was not completely dry when an additional coat was applied.
Efflorescence is normally worn off or washed away on unsealed concrete surfaces.
If the problem is ongoing any fix will only be temporary.
To fix you will need to remove the sealer with a concrete or paver sealer stripper.
Since the reduced levels have become effective we have seen many many formula changes.
The sealer puddled in low areas and was overapplied as result.
Efflorescence is the white powdery substance on the surfaces of unsealed concrete and the white blush seen with sealed floors.
There is a lot to know when it comes to sealers.
This makes the sealer turn white or cloudy a phenomenon called blushing.
Thinly applied acrylic sealer allows this to happen.
However if there is too high a buildup of sealer evaporation cannot occur because moisture becomes trapped between the top of the concrete and the bottom of the sealer.
Unfortunately stamped concrete sealers sometimes fail by discoloring and turning milky white or yellow in color and will need to be chemically stripped to fix.
The small air gap that now exists between the sealer and concrete causes the light to diffuse and create the grayish white cloudy look.
The main ingredient of a stamped concrete sealer stripper methylene chloride has now been banned for consumer use in the us.
