Korrosion Killer is the most useful corrosion inhibitor / lubricant / penetrant / anti-seize / waterproofer available today. Korrosion Killer stops corrosion between metals and prevents rust on bolts, bearings, and driveshafts. Korrosion Killer is an awesome waterproofer too. Simply apply a couple drops of Korrosion Killer on the circuit board of your servos, radio receiver, kill switch, light controller, LED lights, etc. Korrosion Killer should be re-applied every 2 years for maximum protection.