455 PCS Heat Shrink Self Soldering Butt Connector, Solder Seal Wire Connectors Kit, Waterproof Wire Solder Stick Splice Connector for Marine Electrical Automotive (5 Colors/5 Sizes/ 26-10 Gauge)

First time trying these type of connectors. Needed something waterproof for wiring boat trailer lights. Very impressed with them. Did a test on a loop of wire. Slide connector on, Twist wire ends together, and use a high temp heat gun. Shrink tubing tightens up on wire, sealing bands on ends of connectors melt to make a tight seal, then you see the solder ring melt and connect wires. I let it cool down and pulled wire for a strength test. The wire broke, but not at the connection. Be sure to use a high temp heat gun and make sure you see the solder ring melt.

The AKOSN 455 PCS Heat Shrink Self Soldering Butt Connectors are like the leatherman knife of electrical connections—except they don’t come with a corkscrew (sorry, wine lovers). These connectors are a dream for anyone who’s tired of fumbling with wires and wants a quick, reliable solution. With self-soldering technology, they practically do the hard work for you—just add heat and watch the magic happen.Pros:- Ease of Use: No need to channel your inner electrician—these connectors make wiring as simple as a microwave dinner.- Waterproof Design: Perfect for marine, automotive, or any project where water likes to crash the party.- Variety: With 455 pieces in five sizes, you’ll have enough connectors to wire up a spaceship (or at least your garage).- Durability: The heat shrink tubing ensures a snug fit and protects against wear and tear, so your connections stay strong.Cons:- Heat Gun Required: You’ll need a heat gun or similar tool to activate the solder, so don’t try using your hairdryer unless you’re feeling adventurous.- Learning Curve: If you’re new to self-soldering connectors, it might take a few tries to get the hang of it—but hey, practice makes perfect!Overall, these connectors are a game-changer for anyone tackling wiring projects. They’re efficient, reliable, and just a little bit magical. Highly recommended for DIYers and pros alike!

Nice kit for the shop, truck, farm or in the glovebox

Product is worth your money and works surprisingly well!! One key point to remember is USE FLUX and don't rush the process, it needs to heat to be able to work. I use a pen style heat gun that has a metal heat reflecting attachment for the end as opposed to a traditional gun style and it works very well also don't just heat spot rotate the heat around the connector once you achieve necessary temperature you can watch the solder flow and you will know that it has done its job!

Great for my vehicle.

I use these because I need to make 1000s of connections and it is a huge time savings over separate solder/shrink or crimp/shrink steps. They are not as good as the original RayChem, but they do the job well enough. It seems that I really have to cook them to get a solid connection, and this produces some fumes and a little scorched insulation.

Love these, use a heat gun instead of lighter for better results

Great. Easy to use.