I found "KONTAKT CHEMIE Kontakt Gold 2000"
as an ideally targeted solution though the cost is higher (14euro/200ml).http://www.crceurope.com/wwwcrc/tds/TKC3%20KoGold2000.pdfGeneral properties and applications:
KONTAKT CHEMIE Kontakt Gold 2000 is a long-lasting and temperature-resistant lubricant.
The synthetic oil forms extremely thin layers with minimum influence on the contact
resistance of electrical contacts. The lubricant has proved to be particularly effective for
contacts with surface coatings of soft metals, e.g. gold, silver, tin
. The corrosion-inhibiting
effect of noble-metal coatings is improved considerably because they are no longer
scratched by mechanical loads and vibrations.
KONTAKT GOLD 2000 "Protective lubricant for metal-plated contacts" is referenced in technical data sheet of another product:KONTAKT 61
Contact lubricant & corrosion inhibitor:http://www.crceurope.com/wwwcrc/tds/TKC3%20Kontakt61.pdf
1. GENERAL DESCRIPTION
Mineral oil based contact cleaner for all types of electrical contacts.
Cleans, lubricates, displaces moisture and prevents corrosion.
To reduce the wear and tear of soft noble metal (coated) contacts, we do recommend the
use of our synthetic contact lubricant KONTAKT GOLD 2000.