128PCS Heat Shrink Butt Wire Connectors - Intashi Crimp Terminals Kit Insulated Waterproof Wire Terminal Electrical Butt Splice for Marine Automotive Truck Wire Joint Butt Connectors

The heat required to shrink the plastic will surely destroy the wires you're trying to protect. Solder Seal Wire Connectors (example:Kuject) way better and no crimping required. Literally threw this package in the trash after a handful of trials. Search Amazon for Kuject, you'll likey. WAY BETTER.

I don't really know what the deal is with these crimps. But my normal crimpers that perform flawlessly on other butt-splices do not seem to work very well on these. The wire can easily be pulled or even just fall out after being crimped. Very disappointed.

from the very first one I used the heat shrink had a hole open up when you started to heat it to shrink right where you crimped it at. had to start putting good quality heat shrink tubing over top of these to make them water tight. Shame, it would have been a good kit if it wasnt cheap ass chinese garbage guess you get what you pay for.

They look/feel cheap, but worked as expected. The plastic storage box included is junk. Gonna need to put the pieces in a ziploc else they'll spill all over.

These heat shrink connectors are what I need for some home electrical connections and projects

Needed to fix camper wiring. I have always used crimp connections and decided to try these. Easy to use, went to harbor freight and bought a heat gun. Worked great!

Used in my IOT projects and works great, able to hold the wires tight, different sizes for various uses.

Exactly what I was looking for