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Water vapor is the main factor to destroy the electronic circuit, components, LED display and so on. Too much water vapor will greatly reduce the insulation resistance between conductors, accelerate decomposition, reduce Q value and corrode conductors. 

SPN-31 anti-migration and water-proof nano coating, can prevent water penetration and metal ion migration via a hydrophobic isolation layer on the surfaces of electronic devices. And it has an excellent durability and thermal stability. 

The metal on the circuit board, such as copper, silver, tin and so on, is ionized under certain conditions and migrates to the other pole through the insulating layer under the force of electric field, which leads to the decrease of insulation performance.