1: Before use, it must be fully stirred and evenly mixed.           
2: Add defoamer when the paint is stirred.           
3: Before use, it is generally unnecessary to dilute with water and can be added directly. If some varieties need to be diluted, they need to be used with them.           
4: The dosage should be appropriate. Too much will cause shrinkage, edge shrinkage, poor brushing and repainting. If the amount is too small, the defoaming effect is poor. The best point should be determined.           
5: it is best to divide into two additions, that is, before grinding the pigment slurry and adding the emulsion paint. Generally, each time the amount of added is half of the total, it can also be adjusted according to the bubble condition. Antifoaming agent with good antifoaming effect can be selected in the stage of grinding pigment slurry, and antifoaming agent with good antifoaming effect can be selected in the stage of mixing paint. The results show that organosilicon defoamer is best added in the phase of grinding pigment slurry, and water is added as little as possible, so that it can be fully dispersed, and the dosage can be reduced to the minimum. In the mixing stage, it is better to add non silicon defoamer.           
6: It takes at least 24 hours for the defoamer to reach the balance between defoaming performance, shrinkage and porosity. Therefore, it is necessary to test the coating performance 24 hours later.