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Kuject 350PCS 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

  • Based on 533 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Jun 25
Order within 8 hours and 35 minutes
Available payment plans shown during checkout

Number of Items: 350


Features

  • Easy and Quick to Use: No soldering, no crimping, Kuject heat shrink wire connectors kit require only a heat gun to connect.
  • Waterproof and Sealed: Featuring a dual-wall design with hot melt adhesive rings for Kuject waterproof wire connectors , which offer excellent moisture resistance, making them perfect for outdoor and marine applications.
  • Multi sizes and colors: Kuject heat shrink butt connectors available in a variety of sizes and colors to accommodate different wiring needs. These connectors are flexible enough for use in confined spaces.
  • Durable and Reliable Connection: IATF16949: 2016 Listed, Kuject solder seal wire connectors are made of high quality materials, meet the newest standard of international automotive task forc.
  • Wide Application: Perfect for a variety of electrical wiring projects, including household appliances, automotive wiring, marine electronics, lighting systems, audio speakers, engines, and more. For DIY enthusiasts, electricians, and automotive hobbyists.

Connector Type: Butt Splice


Contact Material: Copper


Insulation Material: Polyethylene


Terminal: Ring Terminal


Material: Copper


Product Dimensions ‏ : ‎ 9.96 x 7.09 x 0.71 inches; 9.91 ounces


Item model number ‏ : ‎ SS350


Date First Available ‏ : ‎ September 8, 2022


Manufacturer ‏ : ‎ Kuject


Best Sellers Rank: #34,061 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #242 in Butt Terminals


#242 in Butt Terminals:


Customer Reviews: 4.4 4.4 out of 5 stars 533 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jun 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Brilliant invention
Number of Items: 350
Thes are awesome for me with my pontoon boat they are totally water proof and the solder melts the wires together I still use shrink wrap to cover them even tho you don't need to I just think it looks clean that way
Reviewed in the United States on April 8, 2025 by Kenneth W.

  • Nice, strong and secure connectors.
Number of Items: 400
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. ... show more
Reviewed in the United States on October 1, 2024 by Kevin C.

  • Great product. Amazon delivery not so great.
Number of Items: 320
The product is great. Amazon delivered it to the wrong unit in my mobile home community. Luckily the person at the wrong address took it to the office instead of keeping it.
Reviewed in the United States on March 20, 2025 by Michael Harper

  • Works ok for the most part
Number of Items: 180
Works good. I’ve done a few wiring jobs with these connectors and so far everything has held up after a few weeks. It does take a fair amount of heat to get the metal to melt, I had a one or two where the plastic melted before the metal did, that was a pain to have to remove.
Reviewed in the United States on January 28, 2025 by Wes Daniel

  • Revolutionary
Number of Items: 400
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 ... show more
Reviewed in the United States on December 27, 2023 by Josiah Volz

  • Love this product
Number of Items: 400
Works as good as described
Reviewed in the United States on January 20, 2025 by Chris M

  • Love these things. Never solder again.
Number of Items: 400
These things are so cool. Best consistent butt connection I've ever been able to make. I use a heat gun with the narrow tip. You can burn through them if you're not careful. There is a fine line between hot enough to melt the solder ring and not melt the heat shrink. Once you get the hang of it you can do it every time. I lost his the little colored ring grips the wire too. You can kinda hit that part first to help hold the wire then hold it on the solder ring. I always do another layer of heat shrink just in case I burn through the one it's made of. I will definitely buy more of these. I hope they have different types of connectors in this same style. I do a lot of diy vehicle electrical work, these are my favorite now ... show more
Reviewed in the United States on August 25, 2023 by Amazon Customer

  • Doesn't work
Number of Items: 350
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!!
Reviewed in the United States on March 28, 2024 by DENNIS P.

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