Concrete Sealer White Haze

The sealer puddled in low areas and was overapplied as result.

Concrete sealer white haze.

There is a lot to know when it comes to sealers. If your sealed surface turned hazy or white it s most likely due to excessive moisture. It covers topics like. Thinly applied acrylic sealer allows this to happen.

Trapped water moisture and over applied sealer trapped moisture under the sealer is the most common reason that the sealer has turned white. Reasons for sealer issues. This makes the sealer turn white or cloudy a phenomenon called blushing. If the problem is ongoing any fix will only be temporary.

The small air gap that now exists between the sealer and concrete causes the light to diffuse and create the grayish white cloudy look. Moisture vapor pressure contamination or over application of the sealer can cause this problem. Today the current voc compliant sealer gives off less than 400 grams per liter. Sealer turned a white or cloudy color a white or cloudy color is caused by moisture that is trapped inside 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. Since the reduced levels have become effective we have seen many many formula changes. There are a number of reasons this could have occurred. This happens to sealers that are not breathable or over applied.

Efflorescence is the white powdery substance on the surfaces of unsealed concrete and the white blush seen with sealed floors. The sealer was not completely dry when an additional coat was applied. The main ingredient of a stamped concrete sealer stripper methylene chloride has now been banned for consumer use in the us. 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.

Brush up on your knowledge by downloading a free copy of our sealing gone wrong slideshare. To fix you will need to remove the sealer with a concrete or paver sealer stripper. Efflorescence is caused by vapor migrating through the slab bringing soluble salts to the surface of the concrete.