350 Pcs Solder Seal Wire Connectors Heat Shrink Butt Connectors Kit Marine Waterproof Wiring Electrical Cable Splice Terminals for Boat Automotive RV Trailer

Great functionality and handy to have on hand. Permanent connectors with a solid electrical connection are less likely to corrode or break than a lot of compression types. You can overheat or underheat these and so some level of precision is required. However, it is not complex and when it counts these are very solid with the added bonus of built in heat shrink wraps around the fitting. Definitely a more professional look and fit than normal connectors.

The first time I used these I was not happy with the results but I just used them on a project with really small wires... around 20 or 22 gage. Crimp connections do not work well on wire that small. These worked great. Used a heat gun to melt the solder and shrink the rubber. They do have a place for the right job.

This will save you in a pinch.Beats the old style soldering iron.

These connectors worked out good, used them to rewire my boat trailer. Perfect fit and a good seal. Only thing I noticed was the solder doesn’t melt completely but enough to make a good connection and it does shrink down to tighten connections.

The media could not be loaded. I think the reviews complaining about these connectors are not using them correctly. They worked perfect for me.They have a strong hold better than crimping, an airtight seal, and if you use the proper size for the wire you're working with they shrink to a glove tight snug. I've had zero problems with connectivity on any of my projects.These are not regular heat shrink tubes. You can't use a lighter or a torch. A lighter won't melt the solder, and a torch will melt the tubing and your wire before it melts the solder.I used a heat gun I got off of Amazon for $20. It has two heat settings, and a reflector on it so the entire tube was heatedly evenly in seconds. Spend just a few extra seconds around the solder ring.Don't immediately try to pull on the connection. Of course it's going to come apart while it's still curing. These are made to withstand shaking and movement, not heavy weight pulling. No one is going to come and tug on your wires to pull them apart.All that aside, I absolutely recommend these shrink tubes to anyone who's doing at least minor automotive electrical wiring. I installed a dash cam, aftermarket radio, and rear view cam into my car using these and they have held up perfect.Short of it is, don't blame the product for human error.

Works amazing. Just make sure you heat the middle nice and slow and don’t keep the heat in one spot for too long

This kit gets three stars because size wise is great. The sizes fit almost everything you could think of when needing to solder joints for wiring cars. I used this on my stereo equipment and lighting for my truck. The fiction great and hold together very well. They are easy to use and make wiring much easier than twist nuts. My concern on these is the solder itself. I have had a few that does not want to melt the solder. Most of them melt within seconds with a heat gun, but I have some that wouldn’t melt, even on the highest setting. Because if this I’m giving a 3 star review. For the price if this set, they aren’t terrible, but could be better.

Can't say enough about these other than wow. I will buy nothing else, a heat shrink with solder. I was skeptical at first but these things are amazing. Strip your wires slide them into these connectors. Add a little heat, the solder melts the wires are connected and water tight. No crimping necessary. And they are solid