The house is just waterproof, foaming, different shades, cracking, how to deal with it? Tell us about the reasons and solutions today:
First, the bond with the base layer is not strong
Specific phenomenon: the coating and the base layer are not sticky or foaming or insufficient adhesion
Prevention:
1, the grassroots must be cleaned up
2, check the strength of the base layer, no sanding, peeling, loosening
3, water-soluble paint must not have clear water
4, solvent-based coating base layer must be dry
5, the first coating must use the primer
Second, the thickness is uneven
Specific phenomenon: uneven thickness after coating film formation
Prevention:
1. The base layer must be level and free of holes.
2, must be divided into live when painting
3, the consistency of the paint is adjusted according to the time and place
Third, start
Specific phenomenon: there is bismuth in the paint. After the film is applied, the film contains small particles.
Prevention:
1. Do not use paint that has expired or used after mixing.
2. The two-component material is not stirred by manual or mechanical agitation. Pay attention to the mixing material.
3, use the unclean bucket to stir, pay attention to the cleaning of the mixing tank
4, the ratio is not correct, it should be correctly matched
Fourth, paint stratification
Specific phenomenon: stratification of the coating film after film formation, or foaming between coatings
Prevention:
1. In the process of film formation, the cleaning is not in place before each construction.
2, the previous waterproof film has not been completely dried
Fifth, the drying speed is slow
The specific reason: Because the one-component acrylic paint is volatilized by water to form a film, the high humidity and low temperature environment hinder the evaporation of moisture in the paint, so the drying speed is slow.
Prevention:
1. Strengthen indoor ventilation conditions to be more conducive to water
2, the use of thin coating and multi-layer brushing method is more conducive to the evaporation of water. During the construction, it must be waited until the coating film is dried and then brushed again.
3, use cement-based paint for construction, or use other waterproof coatings
6. After the waterproof construction is completed, the film cracking problem
specific reason:
1, the base layer is not cleaned, there is a lot of floating soil
2. Once the coating is too thick, the uneven evaporation of water during the drying process of the coating leads to cracking of the coating film.
3, in the outdoor construction, the external conditions have strong winds and other weather, easily lead to cracking
Prevention:
1. Remove the base layer floating soil before construction, treat the base layer with the primer coating, and adopt the method of multiple times of thin coating.
2, avoid windy weather in the outdoor construction
Seven, waterproof coating into bean curd
The specific reason: the amount of water added to the paint is too large, causing the liquid and powder of the paint to separate, and the powder sinks, like the bean curd
Control measures: control the amount of water added, strictly in accordance with the product instructions for the ratio
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