4.6 Stars | 5000+ Reviews
Perfect for Automotive, Marine and Home DIY projects.
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Stock: 37 Kits Left
IP67 Waterproof
Sealed Performance
UL Certified
Free Worldwide Shipping
30 Day Money Back Guarantee
24/7 Customer Support
Faster than Traditional Soldering
Stronger & Reliable
100% Waterproof & Weatherproof
Works with all wire sizes & types
Trusted by Professionals
Easy for Anyone
Strip your wire insulation 1/3" on both wire ends & twist the strands together.
Use SolderStick Sleeve to connect the wires together with the right connector size.
Apply heat with a heat gun, lighter or blow dryer while continuously rotating the wire.
Enjoy your secured and waterproof wire connection!
Boats
Automobiles
Home Wirings
Audio Systems
ElectricalProject
Medical DeviceAssembly
80°C / 176°F
138°C / 280°F
Dual-walled polyolefin tubing /Copper
“This is a total game changer for DIY electrical work. I used to struggle with crimping and taping connections, which always felt flimsy. With these, I just align the wires, insert them into the connector, and apply heat. The solder melts perfectly, and the heat shrink locks everything in place. The result is a durable, professional-looking connection every time.”
This is the ideal solution for splicing wires. Simply strip the ends of the wires, insert them into the heat shrink tube, and use a hair dryer to heat it. The solder inside melts to create a strong electrical connection, while the plastic tubing shrinks around the wires, forming a secure and durable bond that won’t come apart easily.
“I was skeptical at first, but this made wiring my trailer lights incredibly simple. Just slide the stripped wires into the connector, hit it with a heat gun, and watch the solder melt and the tubing shrink down tight. It forms a solid, waterproof seal that feels way more secure than crimping or twisting. No tools, no mess—just a clean connection that holds.”
Shipping is free on all orders, worldwide. Fast and reliable delivery within 3–5 business days. We offer a 30-day money-back guarantee on all orders.
Millions of satisfied users worldwide
Applications
Boats
Automobiles
Home Wirings
Audio Systems
Electrical Project
Medical Device Assembly
Minimum Shrink Temp.
80°C / 176°F
Minimum Solder Melting Temp.
138°C / 280°F
Material
Dual-walled polyolefin tubing / Copper
Cable/Wire Sizes
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
Applications
Boats
Automobiles
Home Wirings
Audio Systems
Electrical Project
Medical Device Assembly
Quick Secure Connections
Perfect for outdoor projects, it keeps your connections safe from moisture and corrosion.
Guaranteed Weatherproof
Its innovative design ensures a secure bond every time, making your projects smooth and efficient.
Easy To Use & Saves Time
Save time and effort with connectors that simplify your tasks without compromising quality.
Enhanced Safety
Reduce burn & hazard risks to ensure a safer working environment, while being 100% safe for electronics.
Fits All Projects
From automotive repairs to home improvements, it’s the go-to solution for any wiring challenge.
Lasting Reliability
With high-quality materials and construction, it delivers reliable connections that stand the test of time.
4 Simple Steps To Seamless Wire Connections
1
Prep Your Cables
Strip your wire insulation 1/3" on both wire ends & twist the strands together.
2
Insert & Connect
Use SolderStick Sleeve to connect the wires together with the right connector size.
3
Heat To Seal
Apply heat with a heat gun, lighter or blow dryer while continuously rotating the wire.
4
Enjoy Durable Connection
Enjoy your secured and waterproof wire connection!
No Guesswork :
Find The Right Size Fast
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.
SolderStick Vs Tape
VS
Others
Recommended By
Experts, Pros & DIYers
Our products are backed and used by professionals all around the world.
Robby Layton
The Bearded Mechanic
Born Again Boating
Robby Layton 
343K Subscribers
The Bearded Mechanic 414K Subscribers
Born Again Boating244K Subscribers
Find Out Why 50,000 CustomersLove SolderStick
Gabriel
Verified Buyer
Using a heat gun they provided and it was super easy to slip it on, twist the wires and slip it back on to solder and seal in one swoop is wicked cool! Very happy! Gave them
William
Verified Buyer
Work excellent! Seal AND solder wires together! I just hit them for about 15 seconds with my heat gun till shrink tube shrunk then solder melted to wire leads...boom, done!
Brad
Verified Buyer
This solder sleeve works exactly how it is described & kills two birds with one stone of soldering wire as well as sealing the connection. It is a huge time-saver.
Kevin
Verified Buyer
After about 5 seconds the rubber material started to shrink. At about 9 seconds the solder started to melt & bond the wires. I gave the wires a firm tug & there were super tight.
Frequently Asked Questions
A solder wire connector is a heat shrink tube with a low-temperature solder ring in the middle. It connects solder wires without the need for specialized tools.
Both sides of the solder ring have a ring of heat-activated adhesive that creates a seal when heat is applied.
You can get it here. Simply select the kit size and color, and you are done! We will ship single-size wire connectors depending on the connector size you pick.
The Solderstick waterproof solder wire connector kit includesvarious sizes of solder wire connectorsdesigned to create waterproof and durable wire connections.
You can definitely use a small butane or propane torch instead of a heat gun! However, you should not get it too close since you can over-melt the shielding if you are not careful.
Absolutely! Whether you are working with copper, aluminum, or a mix of materials, SolderStick connectors are designed to provide a strong, reliable connection across a variety of wire types.
Yes, these connections are weatherproof. However, remember to heat both ends of the sleeveto create a lasting watertight seal.
SolderStick connectors can accommodate wire sizes up to 10 AWG. For specific projects, refer to our sizing chart to find the perfect fit for your needs.
Yes, if you keep a reasonable distance from the exhaust components(such as pipes, manifolds, and turbo), then these are an excellent choice since they will keep the joint dry and make it far less susceptible to corrosion under the hood.
Yes, Solderstick connectors are also ideal for outdoor use! Our waterproof design ensures connections stay protected against the elements, making them perfect for garden lighting, outdoor sound systems, and more.
Our shipping typically takes 3-5 business days in the USA and 7-10 business days in other parts of the world.
If you are not completely satisfied, we are here to make it right.
We stand behind our products with a 90-day money-back guarantee.
Plus, our customer support team is always ready to assist with any questions or concerns.
Every SolderStick connector uses a polyolefin heat shrink sleeve with an integrated solder ring and adhesive liner. When you apply heat (between 120°C and 200°C), three things happen at once: the solder melts and bonds to both wires, the adhesive flows into every gap, and the outer sleeve shrinks tight around the joint. The result is a sealed, permanent connection that passes IP67 waterproof testing. Unlike standard heat shrink butt connectors that only insulate, these heat shrink solder connectors create a mechanically bonded joint that resists vibration, corrosion, and moisture. Each connector shrinks to 50% of its original diameter, gripping the wire firmly from all sides.
Traditional soldering requires a 60W iron, flux, solder wire, heat shrink tubing, and 5 to 10 minutes per connection. SolderStick eliminates all of that. These are solderless wire connectors, or as some call them, no solder wire connectors, in the sense that you never touch a soldering iron or solder spool. The solder is already inside the connector. Strip your wires, slide them in from both ends, and apply heat with a standard heat gun or butane torch for 10 to 15 seconds. That is it. This makes them easy wire connectors for anyone, whether you have 30 years of electrical experience or you are wiring your first trailer light. No flux, no fumes, no burned fingers. One tool, one step, done.
Road vibration, engine heat, salt spray, and bilge water destroy ordinary crimp connections within months. SolderStick connectors are built for exactly these conditions. The solder bond handles continuous vibration at up to 150°C, and the IP67 adhesive seal blocks moisture permanently. Use them as automotive wire connectors for stereo installs, LED light bars, fog lights, dash cams, and trailer wiring harness repairs. They work as marine wire connectors on boats, jet skis, and pontoons where saltwater corrosion is the number one cause of electrical failure. For trailer wiring splice connectors specifically, the solder joint eliminates the loose connections that cause intermittent brake light and turn signal failures. Mechanics, boat owners, and fleet techs across the US trust these as their go-to auto electrical connectors for any 10 to 26 AWG wire.
The core of every SolderStick is its solder seal design. A ring of 60/40 tin-lead solder sits in the center of the connector, flanked by two rings of hot-melt adhesive, all enclosed in a dual-wall polyolefin sleeve. When heated, the solder flows onto the stripped copper conductors through capillary action, creating a 360-degree metallurgical bond. At the same time, the adhesive rings melt and seal the entry points where the wires enter the connector. This dual-action process is what makes these solder seal wire connectors the most reliable waterproof wire connectors on the market, rated to IP67 (submersible in 1 meter of water for 30 minutes). The bond is permanent. It will not loosen from vibration, temperature cycling between -40°C and 125°C, or exposure to oil, gasoline, brake fluid, or saltwater.
This wire connector kit ships with color-coded connectors covering four AWG ranges: White (26-24 AWG) for signal and speaker wires, Red (22-16 AWG) for standard automotive loads, Blue (16-14 AWG) for medium-current marine and power runs, and Yellow (12-10 AWG) for high-current circuits. Choose from 50, 100, 250, or 500 piece kits depending on the size of your project. The 50-piece starter kit ($24.99) handles a single vehicle rewire. The 500-piece waterproof connector kit ($99.99) covers a full shop inventory or a multi-boat fleet. Every kit includes an even distribution of all four AWG sizes so you are ready for any wire gauge without ordering extras. UL and CE certified. Ships free, worldwide.
Heat shrink wire connectors are insulated splice connectors with a polyolefin sleeve that contracts when heated. SolderStick connectors go further by adding an internal solder ring and adhesive liner, so you get a soldered, sealed, and insulated connection in one step. Standard heat shrink connectors only insulate. SolderStick connectors solder and seal simultaneously.
Yes. SolderStick solder seal connectors are IP67 rated, meaning they are fully sealed against saltwater, bilge water, and humidity. They are used by boat owners and marine techs for navigation light wiring, bilge pump connections, trolling motor leads, and VHF radio installs. The adhesive liner prevents salt corrosion from reaching the solder joint.
The solder is pre-loaded inside the connector. You strip 10mm of insulation from each wire, insert them from opposite ends until they touch the solder ring, then apply heat from a heat gun or butane torch (120-200°C) for 10-15 seconds. The solder melts, bonds to the copper, and the sleeve shrinks. No soldering iron, no external solder, no flux required.
Absolutely. The IP67 waterproof rating and vibration-resistant solder bond make these ideal automotive wire connectors. They handle engine bay temperatures up to 125°C, resist road salt, and survive continuous vibration. Common automotive uses include stereo wiring, LED installations, trailer harness splices, and under-dash connections.
This kit covers 26 AWG through 10 AWG across four color-coded sizes: White (26-24 AWG), Red (22-16 AWG), Blue (16-14 AWG), and Yellow (12-10 AWG). That range handles everything from thin signal wires and speaker leads to heavy-gauge power circuits and battery cables. The color coding matches the industry-standard AWG chart so you always grab the right size.
Traditional crimp butt connectors rely on mechanical pressure alone, which loosens over time from vibration and temperature changes. SolderStick connectors add a metallurgical solder bond plus an adhesive waterproof seal. The result: zero risk of a connection pulling apart under vibration, and zero moisture ingress. In side-by-side pull tests, solder seal butt connectors hold 3 to 5 times more force than standard crimp butt connectors.
Any heat source that reaches 120°C will work. A standard craft heat gun, a mini heat gun, or a butane lighter/torch all activate the solder and shrink the sleeve. SolderStick sells a purpose-built rechargeable heat gun ($29.99) with adjustable temperature control up to 200°C, but it is not required. Avoid open flames like a standard lighter, which can char the sleeve before the solder melts evenly.
The 500-piece kit includes approximately 125 connectors in each of the four AWG sizes (White, Red, Blue, Yellow), giving you full coverage from 26 AWG signal wire up to 10 AWG power circuits. Every connector is individually quality-tested for solder flow and adhesive seal integrity. The kit ships in a compartmentalized storage case. UL and CE certified. Free shipping included.
Discover the ultimate solution for all your wiring needs with the SolderStick waterproof wire connector kit.
Engineered to connect wires securely in any environment, this kit is perfect for a range of applications—from automotive wiring and marine electronics to landscape lighting and outdoor projects.
It is designed to work with various wire types and building wire installations. Furthermore, it can even provide you with a corrosion-resistant connection that delivers reliable performance even in wet conditions.
Our connectors have consistently shown excellent performance in durability and ease of use,m making them a top choice for electrical projects.
Below are the product features of our waterproof solder wire connector kits.
Complete Kit:
Our kits come in stock with up to 500 pieces of waterproof wire connectors in different sizes.
This comprehensive set is ideal for numerous projects, ensuring you have the right connector to add to your toolbox—whether you’re tackling building wire projects or enhancing your landscape lighting.
Color-Coded:
Our wire connectors are available in four distinct colors, making it simple to sort and choose the right wire type for any job. They come in white (AWG 26-24), red (22-16 AWG), blue (16-12 AWG), and yellow (12-10 AWG).
This color-coding system is designed to help you connect wires quickly and accurately, whether you're working with automotive wiring, building wire, or even delicate sound systems.
Quick and Easy Connection:
Once you have prepped your wires, you only need a good heat source to connect them. The integrated low-temperature solder melts as you heat, while the seal created by the connector ensures a secure, waterproof bond.
This means your connections are not only fast to complete but also resistant to corrosion and other signs of wear, making them ideal for high-voltage or sensitive electronics.
Can Be Used By Anyone:
SolderStick’s waterproof solder wire connectors are designed for both professionals and DIY enthusiasts.
This item is versatile enough to use in various scenarios—from home electrical projects to industrial equipment—ensuring a reliable connection that stands up to harsh conditions.
No special tools or expertise are required so you can work confidently on any project.
Reliable Performance:
Our waterproof wire connectors guarantee a secure and long-lasting connection once properly sealed.
Built to withstand vibration, temperature fluctuations, and wet environments, these connectors perform reliably whether you’re dealing with building wire installations or delicate landscape lighting setups.
The SolderStick waterproof solder wire connector kit can be used in various applications, including:
Automotive Wiring: Perfect for connecting and repairing car electrical systems, these waterproof wire connectors ensure that high-voltage connections remain safe and free from corrosion, even under high-vibration conditions.
Marine Electronics:
Designed for wet and harsh environments, these connectors protect against water ingress and corrosion, making them ideal for marine applications.
Home Electrical Projects:
Simple enough for DIY enthusiasts, our connectors are great for domestic electrical projects. They’re perfect for landscape lighting installations, where a secure and waterproof connection is essential.
Industrial Equipment:
With a robust design, these connectors are durable enough for use in professional settings and with heavy-duty building wire.
Lighting Installations:
Whether indoors or outdoors, waterproof wire connectors provide safe and stable connections that are essential for landscape lighting and other illumination projects.
DIY Projects & Sound Systems:
The ease of use and reliable performance of these connectors make them a top choice for a variety of DIY projects and sound system installations where consistent connectivity is a must.
HVAC Systems & Outdoor Projects
These connectors provide secure, corrosion-resistant connections in HVAC systems and other outdoor applications, ensuring efficient operation even in wet conditions.
To keep your waterproof wire connectors performing at their best, follow these best practices for installation, long-term care, and troubleshooting:
Proper Installation
Always ensure that the wires you connect are clean and stripped to the recommended length. For both building wire and various wire types used in landscape lighting or industrial applications, proper preparation is key.
Use a good heat source (heat gun, lighter, or blow dryer) to evenly melt the low-temperature solder inside the connector.
This step is critical to form a secure, waterproof bond that resists corrosion, even in wet environments or during high-voltage applications.
Safety Tips
When connecting wires, work in a well-ventilated area and keep your protective gear on.
Avoid overheating the connectors, as excessive heat can cause the silicone sealant—or the adhesive rings in some models—to break down, leading to unreliable connections.
Furthermore, always handle the item with care to prevent accidental burns or damage, especially when working with sensitive electrical components.
Remember, safety comes first when working with any wiring or connectors.
Troubleshooting Steps
If a connection isn’t sealing properly, check that you’re using the correct connector size for your wire type. Verify that the connector is within the stock and not a mismatched grade compared to your building wire requirements.
Look for signs of underheating or overheating, and adjust your heat source accordingly.
If corrosion is visible or the bond appears weak, consider re-insulating the connection with additional silicone sealant or replace the connector with a fresh waterproof wire connector to ensure a stable, long-lasting connection.
Here are some more SolderStick products and collections you can check out:
T-Tap Wire Connectors | Waterproof Wire Connectors | Heat Guns for Soldering | Wire Nut Kits | Wire Connectors | Butt Connectors | Ring Terminals | LED Connector | Wire Crimping Tool | Wire Eyelet Connectors | Fork Connector Kit | Spade Connectors | Copper Cable Lug | Push-In Terminal Block Wire Connector | Piggyback Space Connector Kit | Colored Heat Shrink Tubing | Bullet Wire Connector | Ferrule Connector Kit
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