Waterproof shrink solder connectors?
Ok so these are connectors I ended up buying on amazon.
Here’s how they look on the wire before being shrunk
And here’s after it’s shrunk with the low (750*) setting on a heat gun. As you can see, the solder melted very nicely.
This was a test piece of wire so I grabbed ahold of bothe ends and pulled as hard as I could and the splice never budged. I’ve tried soldering before and it was a major fail. These connectors make splicing wires SUPER easy!! A++ from me!!