These solder wire connector kit contain 4 different connector sizes that should suit most of the wires you encounter. Using them is fairly easy as long as you have clean, stripped wire that solder can adhere to. One thing to note is that during the heating process, the connectors become very soft and if you have any strain on the wires, the connection might deform and become unusable. So it is important that the wires are held straight in place before the connectors are heated. But once done correctly, the connections appear to be very secure and are waterproof.The heat gun is nice and compact and is easy to use compared to a regular heat gun that is just too bulky for this type of work. This does not have any safety certifications such as UL or ETL, but since it is not normally left unattended, this is less of a concern. The clip-on deflector works well to heat the wire connectors evenly. At high heat setting, the heat gun does a quick job of melting the solder and sealing the tubes.Overall, this is a decent set of solder wire connectors and a compact heat gun that achieve waterproof connections which is handy to have for various projects.

I am using solder sticks for a renovation project. These work so much better and faster than any other connectors I’ve used in the past. I chose the kit with the heat gun because it provides an even distribution of heat and provides better results.

I hadn't used these before and was frankly skeptical. Turns out they've been out for a while and have had time for the technology to mature. I got the version with the heat gun as it is matched to the purpose and comes with the clever diffuser clip on.First test was with 16 gauge stranded - didn't do anything special, just stripped off about 1/4" of each wire, meshed them and gave a bit of a twist. The heat gun came up to temp quickly (had to move my hand further down the wire) - shrunk the ends to hold in place then while turning it back and forth in the diffuser, focused on the solder. It melted quickly - the central band shrunk down but the solder didn't change color. However on either side where I could see bare wire, the solder flowed and was silvery on both sides until it cooled. Nice!This is SO much better than crimp connectors, or doing soldered connections with heat shrink tubing. I'm converted!

Quite honestly, I expected to be very pleased with this when I saw it on Amazon, maybe even excited. I was kind of underwhelmed. It is not as easy to use as a crimp and does about the same job. I don't know, maybe I was not using it correctly. It came with no instructions, the best I could get it the video on Amazon which may have been made by a shill.The first time I tried to use one of these, I stripped the ends of my wires plugged them in the end and heated it up. And heated and heated...The title says "Solder Stick" so I figured I should see the solder melt or something. The thing is solder melts at a temperature where the shrink style tubing shell becomes very flexible. I thought I had things connected and when I moved things a moment later, they fell apart. The only trick I could guess is that you have to make sure to heat very uniformly. When I was first using one of these, I had a connected on one end that was hard to maneuver to be heated by the heat gun. I made one later that is just two wires and looks to be pretty well connected but I was not how well. It had low resistance but that can just mean the wires are touching.I decided to run a test on a few types of junction. I took four pieces of 18 AWG wire, connecting one with one of these Solder Stick Wire Connectors, one with a regular crimp and shrink tubing, one I soldered myself and put on shrink tubing. The fourth, I left as a plain straight piece of wire to serve as a "control." The crimp went on fastest followed by this "solder stick wire connector." I'm pretty bad at soldering so that took forever. The listing says it has "IP67 water resistance." IP67 says you can submerge it in a meter of water for 30 minutes without damage. I put all four in water that had dishwashing liquid to see if I could measure resistance from the wire to the water. In all cases the resistance finite but in excess of a megohm; including the plain wire. Maybe my wire is not as water proof as these solder stick connectors are. I then rigged up a test fixture to try pulling them apart. The plain wire and my soldered connection held up to the limit of 50 pounds. My crimp broke at about 25 pounds and this failed at about 30 pounds.I took the solder stick connector apart after it broke and the solder melted but it did not flow into the strands of the wire. My wire was old but what I put in the connector was newly stripped so I don't think it was corroded. I'm going to experiment more.The heat gun has two speeds, in low speed, I measured about 170 watts. In high speed, I measured 370 watts. Using the gun, I was able to melt 60/40 solder onto 18 AWG wire but that does not say much.Maybe I should add a positive note, if you get this package with the heat gun you have all you need and a bunch of them. I have a great collection of crimps because over the years, I have been annoyed not having the size I needed so I got this great big set to go with the stripper/crimper multitool I got a Home Depot years ago. I learned how to crimp wires in high school.There looked like a really great product before I started using them. I have plenty still so I'll as I use them, if I find an awesome trick to their use, I'll update this review. Until then, "OK but not exciting" is the best I can say.

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