120PCS Solder Seal Wire Connectors - Sopoby Heat Shrink Waterproof Butt Connector Kit Insulated Automotive Marine Electrical Wire Terminals
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Monday, Nov 17
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Size: 120PCS
Features
- PREMIUM SOLDER SEAL RING: Tubing reduces in size, the enough solder will melt and flow through the stripped wires, ensure a long lasting connection for your application
- BETTER WATERPROOF SOLUTIONS: Double wall design, Hot Melt Adhesive inside ensures wires strongly connected and prevent wires slipping from the terminal; Polyolefin outside tubing provides insulation and improves pullout strength
- ABRASION RESISTANCE HEAT SHRINKABLE TUBE: Premium tube materials are specially designed to be used in harsh environments. Protect the wires and cables from abrasion, cutting, scuffing and low impact situations
- EXCELLENT WIRE CONTACT - The tin barrel provides increased current flow, and ensures less voltage drop, preventing wiring failures and reducing equipment downtime
- WIDE APPLICATIONS: Excellent stability, water resistance and electrical conductivity provide durable connection for motorcycle, off-road vehicles, lawn tractors, RVs, fish finder and marine application. Widely used on multiple projects of your Christmas lights, ships with high waterproof requirements motorcycle stereo, boat electronics, equipment switches
Color: Yellow, Blue, Red, White
Connector Type: Solder
Contact Material: Copper
Insulation Material: Polyolefin
Terminal: Butt Terminal
Package Dimensions : 7.48 x 4.29 x 0.63 inches; 3.53 ounces
Item model number : Sopoby334
Date First Available : May 23, 2019
Manufacturer : Sopoby
Best Sellers Rank: #10,738 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #67 in Butt Terminals #3,904 in Electrical Equipment
#67 in Butt Terminals:
#3,904 in Electrical Equipment:
Customer Reviews: 4.6 4.6 out of 5 stars 15,303 ratings
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Nov 17
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: 120PCS
I’ve used these Sopoby solder seal connectors across multiple projects—vehicle mods, electronics tweaks, even a few reptile habitat upgrades—and they’ve held up well. The dual-wall design with hot melt adhesive inside gives a strong seal, and the solder ring melts cleanly with a heat gun (skip the lighter unless you like uneven results). Color-coded sleeves make it easy to match wire gauges (AWG 26–10), and the included case keeps everything organized. Once shrunk, the connection is tight, waterproof, and surprisingly durable—even in outdoor or high-humidity setups. Just make sure to heat evenly and rotate the connector for a proper seal. If you want fast, reliable wire joins without crimping tools or messy soldering, this kit delivers. Not fancy, but functional—and that’s what counts.
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Reviewed in the United States on August 29, 2025 by TiTanRage
Size: 120PCS
I have used several of these connectors for different projects, including adding accessories to my RZR and fixing various appliances around the house. One of the standout features of this kit is its ease of use. The solder seal connectors create a strong, waterproof bond without the need for complicated crimping tools, making my work faster and more efficient. These connectors provide a secure connection that holds up well, even in tough conditions. I was particularly impressed with how well they performed when used on my RZR, where they faced exposure to vibrations, dirt, and moisture—yet the connections remained intact and reliable. For appliance repairs, the heat shrink design ensures a tight, insulated seal that has given me peace of mind knowing that the electrical work is protected. Overall, this kit has proven to be an invaluable addition to my toolkit. Whether for automotive, marine, or household electrical projects, these connectors have consistently delivered quality results. If you need dependable, high-quality wire terminals that are waterproof and easy to use, I highly recommend giving this product a try.
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Reviewed in the United States on November 4, 2024 by Rosa
Size: 120PCS
They work decently just be careful not to overheat with lighter or will melt before solder even melts which has happened a few times which can be annoying.
Reviewed in the United States on January 31, 2025 by Chawlez
Size: 120PCS
I bought these because I do a lot of guitar electronics, and I was just getting tired of soldering wires together, then applying shrink tubing. These things are great; but you have to know a few things. First, don't expect that the solder inside will melt as quickly as you see in the ads. It melts, but it takes a while. Remember to heat all around the diameter of the connector, not just one side, for a more even distribution of solder, and better shrinking of the tube. Second, make sure that the ends of your wires are both long enough to reach to the center of the connector. just slide the two ends past each other, then apply heat. Not only does the solder melt to solder the two wires together, but the body of the connector acts like shrink tubing, and the two rings at either end of the connector shrink to help hold the wires in place. Third: heat. It is tempting to use either a butane lighter or soldering iron tip to melt the solder and shrink the tubing, but don't do it. The connector will start to melt (soldering iron) or turn black (butane lighter) The soldering iron can also melt a hole in the connector, which kinda defeats your purpose. A good heat gun is quick, easy, and leaves the connectors looking pristine and perfect. (The heat gun I use is about $20 on Amazon.) A note, though: give time for the finished connector to cool down--like a minute or two--before you test the connection by pulling on it. Also, use the smallest connector that will fit the wires you're using. Using a larger connector may seem easier, but the smallest connector you can use will make perfect connections. I've used so many of these that I'm going to have to order more--only this time, I'm going to get the BIG box...
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Reviewed in the United States on August 26, 2020 by Tom Pardue
Size: 120PCS
These 120 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!
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Reviewed in the United States on January 14, 2025 by Huzaif
Size: 120PCS
Exactly what was pictured worked great highly recommended excellent quality 🌟🌟🌟🌟🌟
Reviewed in the United States on August 13, 2025 by Jesse marcum
Size: 120PCS
These are the best things I have ever purchased. I just used them working on my Corvette and they work excellent
Reviewed in the United States on September 24, 2025 by Jeff
Size: 250PCS
ok. not what I expected. solder does not work well/ and wires do not hold in place
Reviewed in the United States on September 1, 2025 by Maria