What are the reasons for the whitening of waterproof coatings?

The reasons why waterproof materials turn white are as follows:

One: When encountering open water

There are many reasons for the appearance of open water. In most cases, it is classified as brush waterproofing. Brush waterproof before and after.

The first is that there is open water in several layers: adding water to the waterproof coating, being exposed to rain during the maintenance period, etc.;

The second is that there is open water after waterproofing construction: accidentally encountering water after applying waterproof materials;

Recommendation: No open water should appear before or after construction. The base layer needs to be wet before waterproofing construction, but there must be no open water;

Two: Weather

< p> Humid or low-temperature weather causes waterproofing to dry and solidify slowly, so the waterproofing layer may not dry and become whitened by moisture in the air.

Recommendation: Avoid construction in humid weather or weather with a temperature below 5℃.

Three: Uneven coating

If the waterproof layer coating is uneven during the construction process, it may also cause the waterproof layer to become white, partially white, and there will be no leakage after the water storage test. , proves that the whitening area has little impact on the waterproof layer and does not need to be treated. If serious whitening or strength problems occur, leading to water leakage, they need to be eradicated and re-constructed.

Recommendation: The thickness of the ground waterproof layer is 1-1.5mm, and the floor drains, pipes and other easily permeable parts can be painted 1-2 times more

Four: Mix the color with the basic cement

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During the construction process, when the waterproof material is applied thinly, it is easy to mix with the color of the base layer, and it will appear white, but in fact it is not really white. As long as the water storage test is OK, , no special treatment is required.

Suggestion: Don’t brush the waterproof layer too thickly or too thinly.