"Waterproof Cooling Fan" insulated liquid coating drying after soaking the entire motor seal. Insulated vacuum pressurized liquid coating coating insulating effect and the characteristics of the program were different after soaking method is simple, the process is simple: seal coating thickness varies, tend to have bubbles, pressure difference, assembly and operation easily broken seal. Multi-level seal to enhance the protective effect, but still easy to damage the assembly and operation of sealing, waterproofing effect in general.