2478 reduces the surface tension most strongly among wetting agents of similar structure. The surface tension can reach 16.4, thereby providing strong wetting ability and improving the wetting ability of the base material. It can also improve the wetting, flowing and leveling as well as help wetting and grinding pigments. Adding it when grinding pigments can improve the wettability of pigments, shorten grinding time and improve grinding effect. It does not increase surface slippery and is sensitive to pH value. It is recommended to be used in coating systems with a pH of 6~8. It provides excellent pore penetration when used in water-based wood paints.