Electric contacts and circuits, particularly those outdoors, are prone to oxidation and moisture, with consequent increase of malfunctions or short-circuits.
Svitol Technik Electric Reactivator is the right Svitol for solving this type of problem.
You can use Svitol Electric Reactivator to remove oxidation and protect the contacts of door phones and switches to restore electric conductivity.
Without insulating contacts, Svitol creates a thin film which protects from moisture and condensation preventing oxidation, corrosion and short-circuits.
On contacts and electric circuits exposed to condensation and moisture, Svitol is always handy!