GUANGZHOU BAIYUN TECHNOLOGY CO., LTD. zhengjinghui@china-baiyun.com 86-20-3731-2985
01 Packaging and storage of sealants
Since sealants are chemical products, the curing mechanism is to react and solidify when encountering moisture. When soaked in water, the outer packaging of sealants can only play a limited barrier role. Therefore, in summer, sealants should be stored in a relatively high, ventilated, and cool place to prevent the sealants from being soaked in rain or even in extreme weather, which will affect the shelf life of the product and cause curing problems in the product packaging.
The sealants soaked in water should be moved away from the soaking environment as soon as possible and transferred to a dry and ventilated room. The outer packaging carton should be removed, the surface should be wiped dry and placed indoors for use as soon as possible.
02 Correct method of sealant application
Before application, please pay attention to the following:
The ambient temperature requirements for the use of Baiyun brand silicone sealant products are: a clean environment with a temperature of 4℃~40℃ and a relative humidity of 40%~80%.
In environments other than the above temperature and humidity requirements, it is not recommended for users to apply sealant.
The outdoor temperature is high in summer, especially for aluminum curtain walls, where the temperature is even higher. If the ambient temperature and humidity are not within the recommended range, it is recommended to conduct a small area of sealant application test on site and conduct a peeling adhesion test to confirm that the adhesion is good and there are no adverse phenomena before using it on a large area.
During construction, please follow the steps below:
01
Construction sequence of structural sealant (structural sealant for curtain wall, two-layer structural sealant for hollow, etc.):
1. Clean the substrate
The temperature is high in summer, and the cleaning solvent is easy to volatilize. Attention should be paid to the impact on the cleaning effect.
2. Apply primer (if necessary)
The temperature and humidity are high in summer, and the primer is easy to hydrolyze and lose its activity in the air. Attention should be paid to injecting sealant as soon as possible after applying the primer. At the same time, it should be noted that when taking the primer, the number and time of contact between the primer and the air should be reduced as much as possible. It is best to use a small turnover bottle for packaging.
3. Sealant injection
After the sealant is injected, the weather-resistant sealant cannot be applied immediately on the outside, otherwise, the curing speed of the structural sealant will be seriously reduced.
4. Trimming
After the sealant injection is completed, trimming should be carried out immediately, which is conducive to the contact between the sealant and the side of the interface.
5. Recording and marking
After the above process is completed, record and mark in time.
6. Maintenance
Units must be maintained for a sufficient period of time under static and stress-free conditions to ensure that the structural sealant has sufficient adhesion.
02
Construction sequence of weather-resistant sealants and door and window sealants:
1. Preparation of glue joints
The foam rods in contact with the sealant should remain intact. The temperature is high in summer, and if the foam rods are damaged, it is easy to cause blistering; at the same time, attention should be paid to the compatibility of the substrate and the sealant.
2. Clean the substrate
The glue joints should be cleaned in place to remove dust, oil, etc.
3. Apply primer (if necessary)
First, make sure that the surface of the sealant joint substrate is completely dry. In summer, the temperature and humidity are high, and the primer is easy to hydrolyze and lose its activity in the air. It should be noted that the sealant should be injected as soon as possible after the primer is applied. At the same time, it should be noted that when taking the primer, the number and time of contact with the air of the primer should be reduced as much as possible. It is best to use a small turnover bottle for packaging.
4. sealant injection
There are more thunderstorms in summer. Note that after the rain, the sealant joints must be completely dry before injecting sealant .
5. Repair
The temperature is higher in summer, so the repair time is shorter than in other seasons. Repair should be done immediately after the injection is completed.
6. Maintenance
In the early stage of maintenance, large displacement is not recommended.