340PCS Solder Seal Wire Connectors-haisstronica Marine Grade Heat Shrink Wire Connectors-Butt Splice Wire Terminals for Marine,Electrical with Corrosion and Weatherproof(5Colors/5Sizes)

These make wiring so quick and easy! I was skeptical of the plastic melting before the solder but to my surprise it worked as it should. Thanks for a great product!

The kit included everything I needed to complete the rewiring of my tractor. The connectors were easy to use and durable. I highly recommend this to anyone needing weather proof wiring.

I work as a Mechanic at a local national chain. I bought these because my shop foreman/service manager refused to purchase some for the shop. How I use these is to slide both wires in (through the opposing holes) until they cross through the solder. I heat gun and het the ends to hold the wires in place. I then slide heat shrink over the entire connection and heat with the heat gun. You will see the center flatten out (when the solder melts). I remove the heat gun and lightly roll the center between my fingers. Perfect connections, and hella value for your money. I should've took pictures. I was fixing 30+ wires at the engine PCM connector in a 7.3 diesel.

I got tired of the old plastic crimp connectors so I wanted to try this style. However, working on tight quarters where you don't have full access to the wires you are trying to connect to introduces limitations, because a wire stripper is needed and you have to have some wire length available to strip the wire well. In any case, you can loop the connector through to at least one side of the wiring, connect the wire leads, then move the connectors over the wire junction in the right location. With a heat gun, I tried to avoid over-heating but it's hard to get the solder portion to melt without melting the plastic first. Keep in mind there is residual heat being absorbed into the wire. I might try using flux and pre-tinning next time. The diameter of the connector was the perfect size and thickness for the specified wire gauge. The glue and heat shrink portion definitely helps make a nice water seal compared to any other methods. The electrical connection is working, but I will have to keep an eye on it because I just don't think the solder melted necessary. It's supposed to be between 280 and 320 deg F, so the 400 deg F setting on the heat gun should be fine, but it didn't feel like it. When I upped the temperature, the plastics were in meltdown mode. I haven't seen any videos that show exactly how to apply the heat for how long and what temperature.

Seems to be decent enough for the application I used them for. Good for most vehicle wiring applications. Use a very light flame torch or a lighter works. It makes a solid connection. With water resistant joint. I use these type of connections. Better than crimp connection.

Very well thought-out connectors. Easy to use and made good connections.

Works great! Simple to use. A great deal for the money. A must for every toolbox

I just love these things good water tight seal and strong connection

Très bien pour les raccordement de fil de mon auto radio

Great to use, just don't apply too much heat, seals great

Absolutely amazing product, working all life with electronics and that simple but genius connectors are practical and easy like nothing else !!!

Worked perfectly and a great alternative e to a messy soldering job. Loads of different sizes, great value.

Funzionano benissimo, consegna puntuale