340PCS Heat Shrink Butt Connectors, Sopoby Marine Grade Electrical Wire Connectors Kit, Tinned Red Copper Insulated Waterproof Crimp Terminals Butt Splice for Cable,Boat,Wiring

solder seal wire connectors are a fantastic addition to my toolkit. They are easy to use, providing a strong and reliable connection with minimal effort. The heat shrink and solder design creates a secure seal that holds up well, even in demanding environments. They’ve saved me time and hassle compared to traditional soldering methods. A great product for DIY electrical projects or professional use. Highly recommended!

I have worked in the automotive industry for over 25 years, installing and ultimately designing aftermarket electrical systems and harnesses. I typically use either 3M or Molex, but these compare and are much less expensive. You could go to your local hardware store and pay 10-20 times what these cost. Very good butt connectors. The barrels are sturdy and the heat shrink is tough. Just use a good crimper and you will see good results. A small, butane torch works best for the heat shrink. Hopefully the quality will continue. Really good buy.

They work and seal pretty well. I have seen no corrosion or wear as of yet. I'll buy again.

Done the right way, using the proper crimping tool and a heat gun (not fire). There's a lot of ways to connect automotive wiring , some are good, some are bad and some are just stupid. Short of fancier, more skilled and time consuming ways to connect automotive wiring, IMO these are the best things availible on the market. They're waterproof, consistant, easy to use and they better than those 'low temp solder in the middle' connectors which, trust me, will melt together and fail in high heat situations. I've used these type connectors for a long time and will continue using them until something better comes along which I haven't seen yet.

looks good not used yet

Nice connectors

Perfect for bulk

Probably used 1/4 of them so far, no complaints or issues and better then small packs from the auto store! I'll be restocking with them again.