Review on Haisstronica Connectors: Ultimate Marine, Heat, and Waterproof Solution by Aaron Gonzales

It takes experience to figure out the best way to heat them up and not overheat them, but once you get the hang of them these little guys are real gems. . No more tinned wires! The only problem is that the smaller reds/whites tend to curl in the center when heated if you're not careful, and they can burn you if you get too close to the heat gun. I have used them for outdoor LED lighting and they save a lot of time compared to soldering.