Waterproof and insulationg Coating is a kind of special paint,used in protecting PCB and other related equipments from the harm of environment Thereby enhancing their duration and ensuring the safety and reliability. Waterproof and Insulating Coating used as PCB coating, forming a light and flexible flim only 25 -50 microns thick. It can protect circuits from chemical substances (for example : fuel, cooling, etc.), vibration, moisture, salt spray, humid and high temperature under which conditions PCB likely to be corroded, mold growth and short-circuit. It can be used in fields of LED display powersupply transducer motor spybean milk machine and so on.