RK-707 is mainly made of mineral oil with large expansion coefficient and hydrophobic particles as defoaming active substances, assisted by defoaming synergistic substances. Mineral oil increases the expansion velocity of defoaming particles, and hydrophobic particles reduce the entry energy barrier of defoaming particles. The interaction between the two provides excellent defoaming performance. At the same time, mineral oil has a good affinity with organic matter, so it will not cause surface defects. It is mainly used in the emulsion and latex of water-based coatings, and the adhesive made by the emulsion or latex and waterborne building coatings. The effect is more obvious in the system with higher viscosity. It also can be used in the leather edge oil.