You should NEVER coat low pressure / high current contacts with dielectric grease! Not the Icom fuse holders nor automotive light bulb contacts.
It can be used to help seal O-rings or rubber seals meant to keep moisture out and also on some threaded connections like PL-259's where there is adequate pressure between well-tightened connectors to ensure a low resistance connection and help keep moisture out.
Replace the Icom fuse holders with a correctly designed one. They cost less than $5 and take 15 minutes to install. Cleaning the fuse holders and fuse blades is a very temporary fix to long term problem. It's sad that after 11 years this problem is still being debated.
A product like Boeshield T-9 could be used after correct fuse holders are installed. If they have enough contact pressure to bite through the oxide layer and form a gas-tight joint, then applying a thin waxy coating should do no harm and could prevent corrosion. But in most applications that shouldn't be necessary, in my experience. If the fuse is in a water-spray environment, then it should be in a sealed enclosure of some type.
---In ic7000@..., <cpcohen1945@...> wrote :
I had an IC-706 in my sailboat, in salt water, for many years. The fuse holders were similar to the IC-7000 holders.
When I installed the wiring, I spritzed Boeshield T-9 into the fuse holders. It's a combination of soft wax, corrosion retardants, and penetrating oil. The oil evaporates.
I never had any problems with fuse corrosion.
I think you'd have equal success, if you covered the fuse contacts in dielectric silicone grease, which is used for protecting battery terminals from corrosion. It's available in any auto-parts store.
For Boeshield T-9, any marine store should have it.
. Charles / VA7CPC