Kuject 50PCS Solder Seal Wire Connectors, Waterproof Heat Shrink Butt Connector Solder Sleeve Self-Solder Insulated Electrical Butt Splice Wire Terminals for Marine Automotive Boat Truck Wire Joint

Excellent product. Very easy to join broken car wires. The solder and tube melts quickly using a heat gun and provides a secure join. Very quick to make a join. It would be better if there were more sizes of joint for thin wire.The cables I was fixing were in between 2 sizes of joint, but the larger joint melted enough to provide a secure fix.

Fantastic item. Worked a charm Tips. Slide the narrower end on first wind together, small dab of flux to help a good solder, slide back over, centralise, heat solder till it flows into wires then seal left and right, allow to cool without touching ... Perfect 👌👍

Not sure if it's the solder or the heat shrink that's holding the wires tightest but it's effective and makes joining wires simple. Solder in it has quite a low melting point so takes a bit longer than you might expect to harden again (give it a minute). I tried bodging 4 wires in one connector and it's still holding them solid. Personally I wouldn't trust it completely to insulate the wires, I think I'd put another heat shrink sleeve over the top because I'm not certain the solder part won't melt through and it'd be difficult to spot.

The Kuject 50PCS Solder Seal Wire Connectors have been a game-changer for my electrical projects. These waterproof heat shrink butt connectors are incredibly easy to use and provide a secure and reliable connection for marine, automotive, boat, and truck wire joints. The self-solder feature is a game-changer, eliminating the need for an extra soldering tool. All I need to do is insert the wires, apply heat, and watch the magic happen. The solder sleeve ensures a solid bond, leaving no room for error. I appreciate the extra peace of mind these connectors offer with their waterproof properties, making them ideal for use in various weather conditions and environments. The 50PCS assortment provides a good range of sizes, giving me options for different wire gauges and joint sizes. Overall, the Kuject Solder Seal Wire Connectors have made my electrical work much more efficient and reliable. I highly recommend these connectors to anyone looking for a hassle-free and effective solution for wire splicing and connections.

I wish I had found these earlier... what a great way to join cables!

Great to help waterproof a connection even if you don’t have a heat gun and just wrap electrical tape tightly around the connector.

Better than I expected

The selection of sleeve sizes is good and they come in a nice box. The usage of them is disappointing, I did a couple of trial joints with the red and blue sizes, with 0.75 and 1.5mm wire. Initially I set the heat gun to 250C, which shrunk the sleeves, though didn't melt the solder. Next trial was at 300C, again shrunk sleeve and melted the solder, though it didn't flow into the joint and stranding of the wire. Tried 350C and on this time the solder flowed on the smaller diameter wire and little on the larger. A pull check indicated they were not well soldered as both came apart. My thoughts, the sleeves shrink down and the glue in them melts and flows, the solder ring has too high a melting point and needs improved flux to get the solder to flow. I'll use them, though I'll pre-solder the joint before heat shrinking. Have not tested the water resistance of these things yet.

This product great. Saves so much time and provides a great solder. Plus it seals the ends so there is no need for electrical tape or shrink tubing. Perfect for many projects. AAA+++++

value for money

Molto comodi per giunture elettriche su veicoli, varietà di misure buona

Super handige alles in 1 oplossing om kabels te solderen en isoleren. Scheelt een hoop tijd met dit setje.

Das Handling finde ich sehr gut. Einfach zusammen schieben und heiß machen. Da das Zinn aber sehr weich bleibt, kann man das ganze wieder auseinander reißen. Über die elektrische Verbindung (Wiederstand) kann ich nichts sagen. Bin aber skeptisch.