1. The wetness of the substrate causes foaming of the injection.
It is rainy in the south in the summer. If it is used for outdoor construction after rainfall, the interface inside will be directly wetted when the moisture is not dry. When the sun shines on the bonding substrate and the glue joint, the temperature inside the interface rises, the moisture inside the glue seam evaporates, and the uncured will be uncured. The softer seams are blistering, and sometimes the foam of the polyethylene foam pad can cause foaming of the seams.

Solution: During the construction, you can't make progress. You can avoid it after the interface is dry and then glued.

2. The substrate temperature is too high.
In the summer, the surface temperature of the construction substrate will be higher. When the silicone adhesive is cured, the temperature of the bonded material cannot exceed 50 °C. Once the surface temperature of the substrate exceeds 50 ° C, the glue will cause foaming, which will be encountered in the weathering caulking of the metal panel curtain wall.

In the hot summer, when the sun shines on the metal plate, especially the surface temperature of the aluminum plate will reach 80 °C, at this time, the glue injection will easily cause the glue joint to foam.

Solution: Select the second half of the afternoon or cloudy to avoid foaming due to high substrate temperature.

3, uncured glass glue exposed to the sun
Generally, silicone rubber can't be exposed to the sun before it is cured. Especially when the glue is just finished, the sun will be exposed to the sun, which will cause honeycomb bubbles inside the glue joint, which will cause the external seam of the glue joint. Silicone glue will be more noticeable when used. This is very likely to occur during hot summer construction. It is recommended to avoid sun exposure when applying glue to relieve foaming.
Solution: In the morning, glue on the west or north side of the building, and in the afternoon on the east or south side of the building. After the injection, the glue is solidified for a period of time, the surface layer has been crusted, and when the sun is exposed again, it has a certain resistance, and there will be some relief to the foaming phenomenon.