When buying building sealants, you can't say the more expensive the better.

2019-08-06 09:52:22

What are the precautions for the use of building sealants? When purchasing, we can not say that the more expensive the better, because the price positioning of the commodity is mainly based on its use, which can be divided into three types: structural rubber, weather-resistant rubber and neutral rubber. The prices of the three commodities are also arranged in order, so it is very important for us to select suitable rubber varieties according to practical needs when selecting products. At the same time, it is very demanding for the environment. It is not suitable for building materials with grease, plasticizer or other solvents. It corrodes copper, brass and other metals. It is also not suitable for all kinds of stone and iron carbide matrix materials. The quality of the project will inevitably be affected. Of course, too slow solidification rate will also lead to problems such as contaminated stone. Therefore, it is suggested that the general drying time of the surface at room temperature should be about 20-50 minutes.

Therefore, we find that the matters needing attention in the use of any commodity are very important. Only when the construction method is correct can the quality of the construction be well guaranteed. Only when we know the matters needing attention in the use of the product can we reduce many misunderstandings for the builders, avoid the influence of the construction project and improve the construction efficiency.

At present, there are many types of sealants on the market. Different sealants have different application fields. Before buying sealants, we should first confirm the use of the sealants we buy and what we do when buying sealants. Only in this way can we get twice the result with half the effort when buying and using sealants.

It is understood that since the 1980s, with the development of urban construction modernization and the improvement of building function requirements, the variety and quantity of high-performance sealants used for building exterior walls in our country are increasing. Polysulfur sealants were used early. Later, acrylic acid, silicone and polyurethane sealants appeared one after another, which developed rapidly. 1990 The annual total is about 20,000 tons, about 10,000 tons in 1995 and about 40,000 to 50,000 tons in 2001. Among them, silicone sealant develops rapidly with an annual output of about 25,000 to 30,000 tons. "Due to the outstanding weatherability, durability, heat resistance and good adhesion to various substrates of silica gel sealant. Silicone sealant is now used in more than 90% of Chinese buildings. An insider said.

"Silicone sealant was also widely used in Japan. By the late 1970s, after investigation and research, it was confirmed that silicone sealant was the real cause of pollution around the joints of buildings," Mr. Naito, investigator of steel structure engineering construction Department of Japan Architectural Society, told reporters. From then on, Japanese buildings basically no longer use this kind of glue.

In fact, many enterprises have realized the problems of silicone sealant. Through improving process and material selection, some enterprises can produce non-polluting silicone sealant. However, the reality is that because of the high price of this non-polluting silicone sealant, some developers often choose the sealant of general or even worse quality in order to save costs.