Kuject 420PCS Solder Seal Wire Connectors, Self-Solder Heat Shrink Butt Connector Solder Sleeve Waterproof Insulated Electrical Butt Splice Wire Terminals for Marine Automotive Boat Truck Wire Joint

I have a bit over a year's experience with these now. I was skeptical originally, to the point of having seen them advertised, but not trusting the effectiveness or durability of the solder bond. I then received a call from a friend who had completely rewired his snowmobile using the Kuject product and absolutely RAVED about them. He is not easily impressed, thus I decided to try them as I was about to wire a mountain sled I was preparing for use. I, too, was duly impressed.They are easy to use and don't require the use of any 'heat reflector' to get the solder to melt and spread the entire way around the wire bond. You simply pulse the heat gun in 3 to 5 second bursts and continually move around the periphery of the solder joint. This evenly melts the solder to saturate the wire strands and shrinks the waterproof silicone tubing around the bond simultaneously. Just work up to the melt point gradually until you get a feel for the timing required. With brief practice, you will be completing solder joints in 20 to 40 seconds each of very high quality. They also lend themselves very well to tight constraints that are nearly impossible to access with traditional soldering methods!The sled I wired has now seen two winters of use without any wiring related failures or issues. It is used to climb mountains off trail in very deep conditions. When stuck in deep snow (often), it is frequently rolled over several times to get the sled able to be pointed downhill again.... snow gets in everything. Zero electrical issues... period.My traditional soldering gun looks lonely... and will likely stay that way. These are an awesome product. My latest order of them was as a Christmas gift for another friend I know will be pleased with the outcome.

I recently purchased the Kuject 200PCS Solder Seal Wire Connector Kit and I am extremely impressed with the quality and performance of these connectors.Firstly, the variety of connectors included in this kit is fantastic. There are various sizes. This allows me to customize my connections to fit my specific needs.The connectors themselves are very easy to use. The solder seal technology makes it quick and simple to create waterproof, insulated connections. I have used these connectors for various wiring projects, including outdoor lighting and Motorcycle wiring, and have had no issues with water or corrosion.The included storage case is a nice touch. It keeps everything organized and makes it easy to find the connector I need.Overall, I highly recommend the Kuject 200PCS Solder Seal Wire Connector Kit. It is a comprehensive solution for all your wiring needs and the quality is outstanding. The solder seal technology is a game-changer and makes it easy to create reliable, waterproof connections.

Not sure if I got a fluke or if they are all like this, but the all the sleeves in my case are not uniform in diameter. Meaning the open end on one side is a few millimeters larger than the opening on the other end -- like one side was already exposed to some heat. This matters when you're picking a solder sleeve that is nearly the same size as your wire and need to pass it over the joined wires. I must slide the narrow end first, join the wires, then that allows me to slide the wider end up over the wire join. Doing it in the other direction doesn't allow enough space for the wire join to pass through the pre-narrowed sleeves. I'm guessing it was a manufacturer defect in the package I received, but 100% of the sleeves (across all gauges) were like this. I'll probably stay clear of this specific one going forward.

I'm not saying this is better than soldering, but it is definitely easier. Sometimes you can't always get a soldering gun to the wires you're working on. That being said,Worked great for my application. Just make sure you get a nice strong twist on the wires you're putting together and make sure the solder area is evenly over both wires. Hit it with your heat gun, the solder melts your wires are stuck together. The casing also shrinks tightly around the wires. This is the first time using them and I was very pleased.

Makes for quick, tight connections.Just a note people talking about them pulling apart. You heat it up, let solder melt..then let it cool before you tug. People tug while they are still hot and solder hasnt set and plastic is still soft.Used numerous times now without failure. Will be ordering more.

These are a good idea in principle, but they just don't work the way I expected them to - ie faster than soldering, and secure.I should say that I've only tried the smallest size ones so far - perhaps the larger ones work better.I found though that by the time I'd made sure the tin was melted properly (the first ones I tried didn't form a secure connection at all), and tentatively pulled on the wires to test afterward, it would have been way faster and more secure simply to solder the wires together and use heatshrink tubing. The plastic tubing when heated was also less flexible and fatter than using regular tubing.To summarise - I'm sure these will work great for certain tasks, but I'll just stick to regular soldering I think.

the white and red ones are perfect, get a good heat source for them tho, i use a gas flameless heat torch..the blue ones are ok but u have to heat the wire up a bit to get the solder to spread..as for the yellow ones which are for high current...forget it...even if u get the wire and solder hot enough their simply isnt enough solder to adequately soak the conductors....on test the joint got hot at full draw and started to remelt the solder..but the rest worked well and were very good on fitting a new stereo to the car...far easier than crimps and safer due to their water tightness imo..

I've never used these before despite a lifetime in the computer and electronics industry, settling for the 'old fashioned' manual solder and heatshrink method, which can need 3 hands. Thought I would give these a try after reading the reviews and they are absolutely brilliant. The test joints in the image were heated with a hot air gun without a deflector, moving the gun around the wires one at a time. The result is a perfect neat joint.I've subsequently joined much smaller wires with the smallest size and used a butane 'lighter' with perfect results and no burning of the insulation!I'm a convert to this new simple method of inline joining of wires!

Für die Spezies die hier 1 Stern geben weil Sie das Lot nicht zum schmelzen bekommen, ab 350 Grad gibt es keinerlei Probleme, evtl. einen besseren Föhn kaufen oder hingegen der Angaben des Herstellers das Feuerzeug nehmen.Klappt einwandfrei, sind halt absolute „billig“ Verbinder die mit Markenprodukten nicht gleichziehen können. Erfüllen bei vernünftiger Anwendung aber Ihren Zweck absolut.Einen Stern geben weil man billig kauft und zu dumm ist die Dinger zu benutzen ist halt auch etwas unfair.Markenprodukte kosten ab 0.90,- bis 1.20,- das Stück. Entsprechend würde hier das 400 Sortiment ca. 370-400 Euro kosten. Das wollen die Nörgler ja aber wohl nicht ausgeben weshalb sie hier jetzt „Wer billig kauft, kauft im Zweifel zweimal“ erleben.

I brought these to connect some wires on my car that are hard to reach with normal connectors due to being hidden and little or no space to use crimp or scotch type connectors. Just trim to size take off the wire sheafing twist when the connector is on the wire one side of the connection slide the built in solder over the twisted wire and heat with a heat gun. The plastic ends shrink with the solder going soft to leave a strong waterproof sealed join. A great idea, it’s a pity they weren’t around years ago.