After waxing the glass plate, the guiyang waterproof coating mixed in the construction site is applied on the glass plate for many times. The thickness of the film is 1.2-1.5mm. After drying, remove the coating from the glass plate and leave it indoors for 7 days (25~2℃). Then cut the strips with a length of 120-150mm and a width of 20mm, adjust the temperature of the refrigerator to -25℃, and put the sample in the refrigerator for 30 minutes. The rod with a diameter of 10mm is wound back and forth once, qualified without crack. If there are cracks, the low temperature flexibility of the emulsion is not sufficient.

Film thickness test:

Needle puncture should be performed at three points per 100 square meters. The height of the pointer should be measured with a ruler. The average thickness of the film should be more than 2 mm. At the time of puncture, color markers are used for repair.

Inspection of elongation at break:

In waterproof construction, supervisory personnel can arrive at construction site, the mixed material daub on flat glass board (glass board should be waxed first) a few times. The thickness of the film is 1.2-1.5mm. After 7 days, soak in 1% alkali water for 7 days. Then bake in the oven for 2 hours in 50 soil for 24 hours. Extension protection is required for dumbbell tensile test. The retention rate was 80% (200% untreated). If the standard is not up to standard, then the ratio of emulsion in the construction is not enough.

Water resistance inspection:

The coating was applied several times to cement blocks. The thickness of the film is 1.2-1.5mm. Leave the coating for 7 days and soak in 1% alkali water for 7 days. The coating is not layered and does not qualify as empty.

Tar polyurethane is made from coal tar or raw materials containing coal tar. The volatile tar has a pungent smell. At the same time, due to the relatively large molecular weight of tar, it is easy to deposit in the indoor environment, and there is no air circulation. Excessive inhalation of tar in the short term can lead to rapid poisoning and death. Another drawback of this waterproof coating is the use of organic solvents as diluents, organic solvents are mostly toxic substances, such as toluene, xylene and so on. Because waterproof coating surface is compact, solvent volatilization time is long. After finishing decoration works, pollutants will be released within a certain period of time, and long-term inhalation of small doses. Tar and benzene can cause respiratory disease, dizziness, nausea, etc. So the proposal USES without tar polyurethane, of course, the choice is to buy water-based coating, such as polymer cement waterproof coating.