I added a second battery charger next to the OEM charger near the rudder post, and a leak from the quadrant area wet the charger and caused a failure that required replacement. It was then that I discovered that sealing the wire bundle was critical.
Sealants that I like are two that are made by Sudbury. One is a normally thick sealant and I use that for coating cotter pins so that I can't get cut by their tips. The sealant sets quickly and can be cleanly pulled off with needle-nosed pliers.
The other one is a LIQUID and it has the consistency of water. It will run into the smallest cracks and seal very well. I use this for creeping into wire bundles to seal between the wires. The only issue with that is that it is also easy for it to run out before it sets, so I often need to create a dam to block the out-flow.
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