There is also a solution out (I think it popped up on Instagram) that has soft solder inside a heat shrink tube. Put a wire in each end, heat it up, it seals the connection in solder and then the ends shrink to fit.
Solder Seal Wire Connector, something like this:There is also a solution out (I think it popped up on Instagram) that has soft solder inside a heat shrink tube. Put a wire in each end, heat it up, it seals the connection in solder and then the ends shrink to fit.