4.6 Stars | 5000+ Reviews
Waterproof Solder Wire Connector Kit - Single Sizes
Waterproof Solder Wire Connector Kit - Single Sizes
Real solder joint - no crimp to vibrate loose
- IP67 sealed both ends - bay, bilge, washdown
- Colour-coded by size - right one, first time.
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Free Worldwide Shipping
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30 Day Money Back Guarantee
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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
Step 1. Prep Your Cables
Strip your wire insulation 1/3" on both wire ends & twist the strands together.
Step 2. Insert & Connect
Use SolderStick Sleeve to connect the wires together with the right connector size.
Step 3. Heat To Seal
Apply heat with a heat gun, lighter or blow dryer while continuously rotating the wire.
Step 4. Enjoy Durable Connection
Enjoy your secured and waterproof wire connection!
Boats
Automobiles
Home Wirings
Audio Systems
ElectricalProject
Medical DeviceAssembly
Minimum Shrink Temp.
80°C / 176°F
Minimum Solder Melting Temp.
138°C / 280°F
Material
Dual-walled polyolefin tubing /Copper
Cable/Wire Sizes
“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.
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Millions of satisfied users worldwide
Solder and seal in one swoop — wicked cool.
Trailer lights
15 seconds with my heat gun — boom, done.
Truck harness
Gave the wires a firm tug — they were super tight.
Boat wiring
Two birds with one stone. A huge time-saver.
Tractor rewire
30 Day Money Back Guarantee
The Swiss Army Knife Of Wire Connectors
Applications
Applications
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Boats
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Automobiles
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Home Wirings
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Audio Systems
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Electrical Project
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Medical Device Assembly
Technical Specification
Minimum Shrink Temp.
80°C / 176°F
Minimum Solder Melting Temp.
138°C / 280°F
Material
Dual-walled polyolefin tubing / Copper
Cable/Wire Sizes
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White:
26-24 AWG / 0.25-0.34mm2
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Red:
22-16 AWG / 0.5-1.5mm2
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Blue:
16-12 AWG / 1.5-2.5mm2
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Yellow:
12-10 AWG / 4-6mm2
Applications
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Boats
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Automobiles
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Home Wirings
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Audio Systems
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Electrical Project
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Medical Device Assembly
30 Day Money Back Guarantee
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.
30 Day Money Back Guarantee
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!
30 Day Money Back Guarantee
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.
30 Day Money Back Guarantee
Why a crimp connector isn’t enough
SolderStick™
Crimp Connectors
Recommended By
Experts, Pros & DIYers
Our products are backed and used by professionals all around the world.
Our products are backed and used by professionals all around the world.
30 Day Money Back Guarantee
TRUSTED BY 100,000+ DIYERS
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.
30 Day Money Back Guarantee
Frequently Asked Questions
A crimp is a metal barrel squeezed onto the strands. This melts a ring of solder into them, so the two wires become one piece of metal. Then the sleeve shrinks down and seals over the joint. There is nothing to work loose under vibration.
No. Strip the wires, push them in from each side, and apply heat. No crimper, no die set, no soldering iron and no experience with a soldering iron.
Yes. A heat gun is the easiest to control, but a lighter or even a hot air gun will do it. Keep the flame moving around the sleeve rather than holding it on one spot, and stop once the solder has flowed and the tubing has drawn in tight.
Yes, once both ends are properly heated. The sleeve is lined with adhesive that melts and seals against the wire insulation at each end, so there is no open path for water to wick in. That is what makes it suitable for boats, trailers and outdoor lighting.
The colours are sized by wire gauge:
- White — 26–24 AWG
- Red — 22–16 AWG
- Blue — 16–12 AWG
- Yellow — 12–10 AWG
10 AWG is the largest wire these will take.
Yes. Copper, aluminium, solid or stranded, and joints between two different wire types all work.
Yes, keeping a sensible distance from exhaust pipes, manifolds and the turbo. The sealed joint is built for heat cycling, vibration and damp, which is where an unsealed crimp tends to corrode first.
3–5 business days in the USA, and 7–10 business days everywhere else.
If you are not completely satisfied, we will make it right. Every SolderStick product is covered by a 30-day money-back guarantee, and our support team is there if you need them.