1：Before use, it must be fully stirred and mixed evenly.
2: Add antifoam agent under the condition of paint mixing.
3：Before use, generally do not need to dilute with water, can be added directly. If some varieties need to be diluted, they need to be used as they are mixed.
4: The dosage should be appropriate. If the dosage is too much, it will cause shrinkage of holes, shrinkage of edges, poor paintability and poor reapplication, etc. If the dosage is too small, the defoaming effect will be poor. The optimum point should be determined.
5: It is better to add twice, i.e. before grinding pigment paste and after adding emulsion to mix paint. Generally, the amount of each addition is half of the total amount, and it can be adjusted according to the foam situation. In the stage of grinding pigment paste, defoamer with good foam inhibition effect can be used, and in the stage of paint mixing, defoamer with good foam-breaking effect can be used. Experiments show that organosilicon defoamer is best added at the stage of grinding pigment slurry, and add as little water as possible, so that it can be fully dispersed, and the dosage can be reduced to a minimum. It is better to add non-silicon defoamer in the paint mixing stage.
6: It takes at least 24h after adding defoamer to reach the balance between defoaming performance and shrinkage and pore shrinkage. Therefore, the test of paint performance should be carried out after 24h.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150A. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.