In this work, the properties and sealing properties of epoxy resin sealants are studied by means of rheology and laboratory simulation experiments. The result shows that the epoxy resin sealant and its components are pseudoplastic fluids with obvious shear thinning properties. The temperature has a significant effect on its properties. The sealant formed by the ratio of material components in 3∶1 presents a high viscosity at 4℃. In addition, Exponential relationship model between viscosity and temperature is proposed by using Arrhenius relationship and experimental data. The result of underwater simulation experiments confirmed that the sealant has good bonding performance and compressive strength, and can be used as a raw material for injection of shallow water sealing structures.