2 x EvriGard SystemsBuy 2 complete Evrigard systems to protect 2 vehicles and save on our Double Deal. NEW Model Free Worldwide Delivery 8 Year Product Warranty EvriGard Electronic Rust Control (ERC) uses a technology called Capacitive Pulsing which involves the saturation of negatively charged electrons throughout a metal object by way of precise, multi frequency pulses of charge. To understand how this controls the formation of rust, it is necessary to understand how