Things to note when using sealants in winter

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Countermeasures for slow curing

① Take appropriate heating measures;
② Perform a pull-off test on two-component sealants to determine the appropriate mixing ratio;
③ Single-component sealants need to be tested for surface drying time to determine whether they can be cured in this environment;
④ It is recommended to extend the curing period after application to ensure that the sealant has sufficient curing and curing time.

Countermeasures for bonding failure

① Before construction, an adhesion test should be performed in advance, and the construction should be carried out strictly in accordance with the method recommended by the adhesion test.
② If necessary, consider using xylene for cleaning and applying primer to promote bonding speed and reduce the risk of poor bonding caused by low temperature.
③ After the silicone structural sealant is injected, the curing process should be carried out in a clean and ventilated environment. When the temperature and humidity of the curing environment are low, the curing time needs to be appropriately extended. Among them, the curing condition of the single-component structural sealant has a significant relationship with the curing time. Under the same environment, the longer the curing time, the higher the degree of curing.

If necessary, measures can be taken to increase the ambient temperature and humidity. The final result should be based on the rubber tapping test to fully determine the maintenance time of the finished unit. Only then can installation and transportation be carried out.

As one of the building materials, sealant plays a vital role and directly affects the function, service life and value of the building. Therefore, the construction process must be strictly regulated when using the sealant. When constructing in winter and low temperature conditions, the actual bonding of the sealant must be verified in accordance with relevant standards to ensure that the sealant can effectively guarantee the sealing effect of the building.

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