Kuject 400PCS Solder Seal Wire Connectors, 26-8 AWG Self-Solder Heat Shrink Butt Connector Solder Waterproof Insulated Electrical Butt Splice Wire Terminals for Automotive Boat Truck

Thes are awesome for me with my pontoon boat they are totally water proof and the solder melts the wires togetherI still use shrink wrap to cover them even tho you don't need to I just think it looks clean that way

These heat activated solder shrink connectors work well, making secure butt connections.Please note that the proper amount of heat must be applied to activate/melt the solder. A heat gun is essential to properly use these connectors. Please also be aware hair dryer should not be used as a heating device, as it will not provide sufficient heat to melt the encapsulated solder.Once cooled, the connection is permanent and quite strong.I highly recommend these connectors.

Excellent

All in all good. The smallest ones don't seem to solder as well as the larger ones. Still work, just seem to take a lot of heat to get the solder to flow. Heat shrink and sealant seems to be good on all of them. Definite must have for making clean wiring splice repairs.

These are incredible. I have used these now for multiple applications, from a car to sprinkler wires to vending machines. Just carry a heat gun and short extension cord for most places and you're set. You do strip the wires farther than you usually would with a crimp. The only thing I will say somewhat as a warning is that they work way better with stranded wire than solid wire. I have had a couple instances where solid wire pokes a hole in the coupler and I have to start over. Other than that, these are easy to use, guarantee a solid connection, go waterproof, and make it so that the connection isn't a massive piece of plastic that you will be able to see even under shrinkwrap. If you cover the wire with shrinkwrap afterwards, you won't even notice that there is a splice in the wire

The product is great. Amazon delivered it to the wrong unit in my mobile home community. Luckily the person at the wrong addresstook it to the office instead of keeping it.

I tried 2 different heat gun and a small torch but none of them worked. The solder did melt but the connection didn't bond. When I cut the connector apart the wires basically fell apart. I also tried to use some flux on the wires but it didn't help. Would not recommend!!

I used the cordless DeWalt heat gun on high....say about 2" away from the splices. Forgot to use a reflector. Didn't burn or brown.....does take a good 30+ seconds to get the solder to melt. Mainly focus on the solder, and not the shrink tubing.The blue ones worked fine. When I was using one to one wire. But when I had to do 2 to 1 and used the large yellow...each one split....on the doubled up side. So I don't think they can handle uneven splices. Additionally. . when they split, the soldier is not "pushed" into the wore, so the soldier just pools up on the outside and doesn't bond. I didn't dock a star for this, as they work well....just not in this way (2 to 1 splice.....which the instructions don't even mention)