Review on VOLT Solder Wire Butt Connectors by Chris Rigsby

The product came out easily from the small jar. The sleeves match the wire size well. Solder requires a lot of heat to melt. I used a heat gun and several attempts didn't give good adhesion or something was melting around. I had to redo a few joints. The good news is that the heat shrink was difficult to remove, so it's a good physical bond to hold the wires together.