I get adhesive
lined heat shrink in long 3' lengths, and use bare Tinned crimp connectors. I slide on a 2" length of heat shrink, then crimp on the ring connector, (or butts), but never forks.
Then, using the thinnest possible solder and a micro torch, I solder the far end of the barrell on the crimp fitting. With just a quick touch, it does not wick up the wire beyond the barrell, but seals
the barrell end and welds the wire to the connector.
Now slide into place & shrink down the heat shrink, untill goo comes out both ends.
Next, fix the entire wiring
harness every 6 to 8"...
If done this way, the cost is low, but installation
time trippled. The benafit is a virtually submersable wiring
harness that is VERY low in resistance, and will last the entire life of the boat that way.
If your boat is a keeper, and you don't want problems down the line, it makes the extra effort the best way to go. I have opened up the heat shrink on my crimps (done this way) 15 years ago, and they are still shiny!