Precautions for spring construction of sealants for doors and windows

The characteristics of spring climate in my country are: dry, low humidity, and large temperature difference in the north, while rainy, humid, and high humidity in the south. The climate environment affects on-site construction conditions, has an impact on the curing of sealants, and may also affect construction efficiency and quality.

Door and window sealant is mainly used for caulking and sealing between the door or window frame and the glass, and between the frame and the wall to seal and waterproof. Door and window sealants on the market are almost all single-component silicone sealants, which need to react with water vapor in the air to cure. The curing process is affected by both ambient temperature and humidity conditions. The lower the ambient temperature and humidity, the slower the sealant curing speed. The slower.

Before applying door and window sealants, ensure that the compatibility and adhesion tests between the sealant and the base material and related accessories pass. The sealant is within the storage period specified by the manufacturer. At the same time, the sealant is dry, detackified and has satisfactory quality performance after curing. Door and window assembly requirements.

During the construction process, construction should be carried out in accordance with the construction environmental conditions recommended by the sealant manufacturer. For example, the recommended construction environment conditions for silicone sealant are: temperature 4℃~40℃, relative humidity 40%~80%. Different manufacturers may have different requirements for construction environment conditions, which should be confirmed before construction.

In spring, the southern region is rainy and humid, and the humidity is high, which can easily lead to moisture on the surface of the base material at the sealant joint. If the surface of the base material is not dry enough before sealant construction, the presence of water vapor may cause the sealant to bubble; moisture in the sealant joint will also affect the bonding performance of the sealant, thereby affecting the construction quality. When constructing in humid weather, it should be fully confirmed. The surface of the base material must be dry before construction. In addition, if the humidity is too high, it will also have a slight impact on the surface drying time of the sealant and the surface detackification time.

In spring, the weather in northern areas is dry and the humidity is low, so the sealant curing speed may slow down significantly. During the construction process, it is recommended to appropriately extend the post-construction curing time of the sealant, and avoid causing large stress on the sealant joints after the sealant construction. The sealant seam deforms. For door and window assembly construction in door and window factories, both sides of the door and window inlaid glass need to be sealantd. The usual method is to construct one side first, then turn it over after the sealant has solidified, and then sealant the other side. For construction that requires turning over, be sure to ensure that the sealant is cured to a certain extent to resist the deformation of the sealant joint caused by turning over. It is recommended that heating or humidification measures be used during the construction process to improve indoor temperature and humidity conditions and speed up the curing of the sealant.

In short, for spring construction, due to the great climate difference between the north and the south of my country, the concerns during the construction process in the south and the north will be different. The weather changes greatly in spring, which will cause the construction environmental conditions to change accordingly. The quality control of door and window sealant construction should be done well. If the environmental conditions exceed the requirements of the construction process, it is recommended to conduct a small-area sealant test during the construction process and conduct an adhesion test to confirm that the bonding is good and there are no problems with the appearance before using it on a large area to ensure the quality of door and window sealant construction.