I. Introduction: The product polymer as the main raw material, add a variety of inorganic materials, organic water-thickening material mixing together. Non-toxic, tasteless, no radiation, no pollution, comply with environmental requirements; flammable non-explosive, according to general cargo storage and transportation; avoid dust scene ingredients, help protect the atmospheric environment. And thanks to the coating treatment process, the construction is simple, with less, which is widely used in building renovation, old buildings, moisture and water, and other fields. Second, the use of liquid interface agent: 1. Self-leveling cement interface treatment: primary treatment for self-leveling cement floor before construction, improve self-leveling adhesive strength with the grassroots; 2. New and old concrete connection: for construction joints, reinforced beams, old new concrete foundation and transformation of old connections, shear strength increased by 3 times; 3. Smooth grass plaster: replace the concrete surface smooth caustic degreasing, artificial chiseling processes, can increase the bonding strength of more than 6 times; 4. Paving brick panels: interface coating, or dubbed in high adhesion of the mortar, directly paving large brick panels, new tile can be pasted on the old tile 5. Concrete repair and surface protection: can be used for surface protection of concrete and steel to prevent deterioration and corrosion; 6. Oil, sand Primary treatment: There are a small amount of oil from the sand or grass-roots can be directly applied, plastering process; 7. Waterproof, anti-corrosion: construction in the wet grass can be used as a moisture barrier layer of oil paint, and polyurethane coating adhered firmly.