Conformal paint is also called PCB electronic circuit board protective oil, coating oil, moisture-proof paint, three-proof coating, waterproof glue, insulating paint, anti-corrosion paint, anti-salt spray paint, dustproof paint, protective paint, coating paint, three-proof adhesive, etc., the PCB circuit board that has used the three-proof coating has waterproof, moisture-proof, dustproof "three-proof" performance and cold and thermal shock resistance, aging resistance, radiation resistance, salt spray resistance, ozone corrosion resistance, vibration resistance, good flexibility, strong adhesion and other properties.