What is the reason why waterproof coatings are prone to cracking after construction? What to do

1. Waterproof base problems

The base layer is not cleaned and there is a large amount of topsoil; Especially at corners, it is easy to hide dust.

Due to the existence of problems such as loose base layer, hollowing and cracking, the base layer removal process has not been carried out.

Countermeasures: During the construction process, all places with floating soil should be cleaned up, including some corners, to fully ensure the adhesion and adhesion of the waterproof coating. If the base layer itself has problems such as porosity, hollowing, and cracking, the hollowing and loose areas should be removed first, and then the waterproof treatment can be carried out after the solid base layer is cleaned. If there are cracks, use a leak stoppage kit to repair them.

2. Construction painting problems

Over-thickness in one application can lead to uneven evaporation of water during the drying process of the coating film, resulting in cracking of the coating film.

Countermeasures:

Use a primer to treat the base layer, and adopt a 2-pass coating method. The waterproof coating should not be too thick or too thin; Waterproof coating is not applied multiple times, but once to achieve the overall thickness;

3. Construction weather issues

During outdoor construction, external conditions such as strong winds can easily lead to cracking.

Countermeasures:

Avoid outdoor construction in windy weather.

4. Product quality issues

Poor quality waterproof coating products, 1-2 drops of water do have a waterproof function. A good waterproof coating must have good extensibility, adhesion, weather resistance, and impermeability and compression resistance. Therefore, it is recommended to purchase waterproof products with quality assurance, which are durable and environmentally friendly.