02-19-2015, 02:44 AM
What makes the silicone corrosive is not the silicone so much as the acetic acid often used as a curing agent, it has an vinegar smell to it. There are types of silicone that are safe around copper though, any automotive sealant marked as "Sensor Safe" would be all right to use, I suspect that Permatex windshield and glass adhesive may be safe as well since it does not have that vinegar smell. Varnish and wax are safe though, but some melt at too low of a temperature.
Regards
Arran
Regards
Arran