High-performance protection against moisture, humidity and corrosion. This water blocker completely infiltrates all moisture and humidity. It forms a micro-thin protective film with an extremely water-repellent effect. The electrical breakdown strength is extremely high at 200kV/mm. Due to its salt water resistance, it is not only perfect for use in winter, as it protects against the effects of road salt, but also for applications near the sea. Wireless radio buttons treated with this spray according to the operating instructions remain fully electrically functional for years, even outdoors in the weather.