Glorystar · Sealant cracking analysis and solutions
1. Analysis of cracking situation
In the alternating seasons of spring, summer, autumn and winter, it often appears in aluminum-plastic panels and aluminum panel curtain wall projects. Because the temperature difference between day and night changes greatly, substrates with large expansion coefficients such as aluminum-plastic panels, aluminum panels or PVC are greatly affected by temperature. As the temperature increases and decreases, the material will expand and contract to varying degrees, and the sealant within the joint will also expand and contract. For fully cured sealant, it can withstand large displacement and deformation, but for incompletely cured sealant, its ability to withstand displacement and deformation is weak, and bubbling or cracking may occur.
Users are advised that in seasons with large temperature differences in spring, summer, autumn and winter, it is best to perform glue injection construction on the sunny side when the temperature is low, that is, when the glue joints are large, and glue injection construction on the shade side at noon and when the temperature is higher in the morning and afternoon.
It is recommended to build sunshades on the sunny side of the construction to avoid direct sunlight to avoid bubbling or cracking of the sealant.
Construction cannot be performed when the ambient temperature is too low (below 10°C).
Construction should be carried out in summer to avoid high temperatures.
2. Analysis of cracking situation
If the sealant is improperly selected, the displacement capacity cannot meet the requirements for joint displacement.
3. Analysis of cracking situation
During the early curing process of the sealant, the joint deformed too much.
关于广州Glorystar
Guangzhou Glorystar Industrial Co., Ltd. was established in June 1996 with a registered capital of 11 million yuan. It mainly produces high-quality silicone sealant (one of the drafting units of the national standard GB16776 “Silicone Structural Sealant for Construction” and “National Standard Silicone Construction Sealant” GB/T14683) and modified starch powder (industry standard “Putty Additive for Interior Decoration” JC/T 2316-2015), it is one of the few “certified enterprises for the production of silicone structural sealants for construction” in China and the largest and only modified starch powder manufacturer certified by four national ministries and commissions. It is also a national high-tech enterprise, a key high-tech enterprise in the National Torch Plan, and a national outstanding private technology enterprise.
