Why are household sealants prone to problems during use?

1. Why are household sealants prone to problems during use?

First of all, sealants are often called 'glass sealant' because since the 1990s, glass curtain walls have become popular in high-rise buildings in China, so a large number of expensive silicone structural adhesives and weather-resistant adhesive products have been imported from abroad. With the localization and cost reduction of these products, they have been widely used in fields such as aluminum alloy doors and windows and plastic steel doors and windows. Therefore, in the eyes of the public, 'glass sealant' has become synonymous with structural adhesives, weather-resistant adhesives, and sealants for construction. As the excellent performance of 'glass sealant' is widely recognized, it has naturally entered the field of home decoration. We can see from the development history of sealant products in China that construction adhesives are most widely used and used in the fields of curtain wall glass structural bonding, door and window glass sealing bonding, etc. Such products require good weather resistance and strong displacement resistance. , therefore, volatile solvents need to be added during the production process. During use, these solvents evaporate into the air as the colloid solidifies, which is the source of the 'odor'.

Furthermore, let’s discuss how sealant enters the home. During the home decoration process, owners generally entrust third-party decoration companies or construction teams to carry out the construction. Whether it is contracting work and materials, or contracting auxiliary materials, for niche auxiliary materials such as sealant, most owners will entrust the construction party to purchase them. In order to save costs and increase profits, construction parties will purchase low-priced and inferior sealants. Manufacturers of low-priced and inferior products, in order to reduce costs, use inferior solvents, reduce sealant content, and add inferior solids beyond the standard during production, resulting in sealants with strong odor, insufficient bonding performance, poor elasticity, and low chemical stability. Users use Later, 'odor, sealant opening, breakage, yellowing, mildew' and other situations occurred.

2. How to select and use sealant?

So, are there any sealants suitable for home decoration? How should users choose a suitable sealant for home decoration?

In home decoration, sealants mainly have three application scenarios: one is the bonding and sealing of glass doors, windows and sunrooms; the other is the dry construction bonding of prefabricated wall panels, ceramic tiles, rock slabs and walls, and prefabricated floors. Bonding to the ground; third, edge sealing of door and window covers, skirting boards, kitchen and bathroom countertops, and sanitary ware connections with walls and floors. These three types of application scenarios have different requirements for sealant functions.

Scenario 1: The sealant needs to face direct sunlight to resist the powdering problem caused by ultraviolet radiation, and it also needs to maintain good bonding and sealing performance between the glass and the substrate for a long time. Therefore, silicone sealant is still the best choice. Qualified quality silicone structural sealant and weather-resistant sealant can well meet user needs.

Scenario 2: The amount of sealant applied is large, and the sealant is sealed between the board, wall, and floor. It cures slowly and takes a long time for harmful substances to evaporate. Therefore, the environmental performance requirements of the sealant are extremely high, and modified silicone sealant (MS sealant) is more suitable. ). MS sealant with qualified quality does not add solvents in the production process, and does not volatilize harmful substances such as formaldehyde, benzene series, isocyanates during the curing process, which can ensure indoor air quality after decoration. Among them, when dry-hanging rock slabs and ceramic tiles on the wall, it is recommended to choose MS sealant-specific products because of the higher requirements on bonding performance.

Scenario 3: Gluing is applied in exposed places and is mostly used on white decorative layers, which has an impact on the overall and local effects of interior decoration. Therefore, the sealant must be able to resist the shrinkage and displacement of the base material, always maintain a strong bond, and must be maintained for a long time. The color is stable, non-yellowing and non-mildewy. In this scenario, you can choose qualified silicone sealant or modified silicone sealant (MS sealant). It is recommended to choose anti-mildew sealant for kitchens and bathrooms. The climate in the south is relatively humid, so it is recommended to choose anti-mildew products for the entire house.

3. Conclusion

In short, the selection of different types of sealants should be considered based on specific circumstances, such as the location of use, use environment, environmental protection, durability requirements and other factors. In addition, in addition to selecting the right product type according to the scenario, it is also very important to choose brand products. Whether the owner purchases it by himself or entrusts the foreman to purchase it, it is best to do research in advance and clarify the brand and model to be purchased. Do not affect the decoration effect and home experience just because of saving a small amount of money.