Key points of quality inspection of paint waterproofing project.

Building waterproof coating in the process of use, due to improper storage methods or incorrect construction methods, will cause a variety of qualitative changes. It is summarized that the lesions and treatment methods of building waterproof coatings are as follows:
1, storage lesions and treatment methods
waterproof coatings enter the field, if not immediately constructed or the waterproof material expired, may produce the following quality changes.
1
the pigment
to the bottom can no longer be dispersed

. The main causes are:
(1) paint is not stirred sufficiently during the storage period,
(2) is stored too long or the temperature is too high,
(3) diluted with water.
to prevent the precipitation of waterproof coatings, should avoid overheating or long-term storage, according to the manufacturer's instructions to store waterproof coatings.
2
skin
waterproof coating during storage, due to the container is not closed, storage environment temperature is too high, will be in the container skin. The methods to prevent the skining of waterproof coatings are:
(1) to avoid unnecessary opening of paint barrels, to ensure the sealing of the container, and
(2) to store according to the specified appropriate conditions.
3
Viscosity Reduction
JS waterproof coating during storage, if the viscosity decreases and produces odors, indicating that bacteria degrade the ingredients and other thickeners in the raw material, at which point the coating has gone bad and should be discarded.
2, the construction process lesions and treatment methods
01
slow dry and back-stick
waterproof paint brush, coating film more than the prescribed time is still not dry, called slow dry. If the coating film has been formed, but there is still a sticky finger phenomenon, called back-sticking. The reasons for this are as follows:
(1) brush is too thick;
(2) the previous coating film has not been dried and brushed a second time;
(3) the grass surface is unclean,
(4) the grass surface is not completely dry.
treatment methods are: (1) for mild slow drying and back-sticking, can enhance ventilation, appropriately raise the temperature;
02
the paint
the paint coating and the paint film becomes powdery. The main reasons are:
(1) paint weather resistance is poor,
(2) wall surface treatment is not good,
(3) when painting the temperature is too low, resulting in bad film forming,
(4) coating too much water.
solution to powdering is to clean up the powder, then seal the wall with a good performance interface agent, and finally paint two rigid waterproof coatings.
03
discoloration and fading
the discoloration or fading on the coating film is due to:
(1) substrate humidity is too high, resulting in
discoloration and discoloration;
waterproof coating does not need to add water, wait for the surface to dry and then paint a second waterproof coating.
04
Peeling and peeling
due to the high humidity of the substrate material, the surface treatment is not clean, coupled with incorrect brushing methods or the use of poor quality primer, will cause the coating film from the base surface. In this case, should first check whether the wall is strong, and then the falling paint and loose material peeled off, in the faulty surface with leakage king repair, and then with rigid waterproof paint bottoming.
06
hanging
at the construction site, paint can often be found hanging from the wall or dripping down, forming a teary or ripple-like appearance. The reasons for this are:
(1) paint film is coated too thick at once,
(2) adds too much water,
(3) is applied directly on the surface of the unpainted coating film.
solution is:
(1) coated several times, each time thin layer;
(2) two-part paint without water,
(6) sandpaper to polish the brushed object old coating film.
.