$34.99 $24.99

No More Re-Dos! -Alex W.
My trailer lights kept cutting out on bumps. Replaced the bad splice with this and haven’t touched it since – still solid after rain and highway miles.

Tight Space Savior -Gabriel T.
Worked great under the dash where there’s no room to solder properly. Way cleaner than fighting a soldering iron upside down.
Min. Shrink Temp: 80°C / 176°F
Min. Solder Melting Temp.: 138°C / 280°F
Material: Dual-walled polyolefin tubing
White: 26-24 AWG | 0.25-0.34mm²
Red: 22-16 AWG | 0.5-1.5mm²
Blue: 16-12 AWG | 1.5-2.5mm²
Yellow: 12-10 AWG | 4-6mm²

Prep Your Cables
Strip your wire insulation 1/3″ on both wire ends & twist the strands together.
Insert & Connect
Use SolderStick Sleeve to connect the wires together with the right connector size.
Heat To Seal
Apply heat with a heat gun, lighter or blow dryer while continuously rotating the wire.

With our color-coded tubing, picking the right connector for any job is a breeze. Just match your wire to the chart on the box—quick match, no hassle.

This is where all the answers to your questions are.
Do I need special tools to use this?
No. You don’t need crimpers or a soldering iron. A standard heat gun works best, but many customers successfully use a hair dryer or lighter in a pinch. That’s part of what makes these so convenient.
Is the connection actually strong, or just convenient?
It’s both. Once heated, the solder bonds the wires together while the heat-shrink tubing seals everything in place. The result feels solid immediately and doesn’t loosen when handled or vibrated.
Are these really waterproof?
Yes. The tubing shrinks tightly around the wire and creates a sealed joint that helps keep moisture out. Many customers use these on trailers, boats, and outdoor wiring without issues.
Will the solder melt before the tubing burns?
That’s a common concern, but these are designed so the solder melts at the right temperature before the tubing degrades. As long as you apply steady heat and don’t rush it, everything activates as intended.
Can I trust these for automotive or marine wiring?
Absolutely. These are commonly used for vehicle repairs, trailers, boats, and other environments where vibration and moisture are a problem. Customers often switch to these after crimps fail.
What wire sizes do these work with?
They come in multiple sizes to match common wire gauges from 10-26AWG or 0.25-5mm². As long as you choose the correct size for your wire, the connection will shrink down tightly and hold properly.
How long is the delivery?
Delivery typically takes 3–5 business days for orders within the USA and 5-10 business days for international orders.
Most customers receive their order within a week, and you’ll get a tracking number as soon as it ships so you can follow it every step of the way.
I used these to fix a wiring issue on my trailer, and they worked way better than the crimp connectors I usually fight with. Once the solder melted and the tubing shrank, the joint felt solid right away instead of loose and questionable.
I was honestly skeptical at first, but after using a few of these I’m sold. The solder flowed cleanly and the heat shrink sealed everything tight. It didn’t move at all when I tugged on the wires afterward.
This is the perfect solution to splicing wires. You strip the ends of the wires to be spliced, put the ends into the tube and then run the hair dryer to heat up and activate the bead of solder inside the tube and shrink the plastic ends to form a splice that will not fall apart the second you release the joint.
Used these on some automotive wiring and they saved me a lot of frustration. Once the solder melted and the ends shrank down, the splice stayed together and didn’t feel flimsy like tape or crimps usually do.
After years of using tape and crimps, this felt like a more permanent solution. It didn’t feel temporary or “good enough.” It felt finished.
Super easy to use and the connection feels solid. I had two wires joined in seconds, and the seal looks clean and secure.
These connectors worked great for a quick wiring repair in my garage. Heat, connect, and it creates a strong bond without a messy setup.
I was surprised by how fast the process was. The connection feels tight and durable, and I like that everything is sealed in one step.
Perfect for small electrical repairs around the house and workshop. The solder melts evenly and gives the wires a neat, professional-looking connection.
Factory-strong connections in seconds really describes it well. I used these on several wires and every joint came out firm, insulated, and much cleaner than my usual method.
We stand by our product quality. If you are not pleased with your purchase, we offer a 7-day quality guarantee on all products. If you have any additional questions or would like to request return, refund, exchange, feel free to contact us at [email protected].
Learn more about our return, refund, and exchange policies here.
Order processing & shipping time within 3-5 days, and delivery time within 14-21 business days from shipping date. During high volume periods, the processing time may take an additional 2-4 business days . Learn more about shipping FAQs here.
On average, the shipping fee is $4.95 per unit. However, shipping fee may vary due to promotional activities. Please visit the checkout page to obtain your final shipping charges.