Guaguaniao two-component polyurethane adhesive has good water resistance, high bonding strength, can be used under harsh conditions, and has a long-term anti-corrosion life. It also has chemical resistance, corrosion resistance, and durability, and has good low-temperature flexibility. It still performs well in harsh corrosive environments. In addition, it is a reactive adhesive that undergoes cross-linking reaction after mixing to produce cured products, with a high initial adhesion force, The final adhesive strength is greater than that of single component sealant, which can meet the requirements of structural sealant.