Secure connections without a soldering iron
The self-soldering design creates a reliable joint when heated with a heat gun, so you get professional-grade splices in seconds.
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- 14-day easy returns
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Why customers love it
Waterproof wire splices in seconds, no soldering iron needed
These self-soldering heat shrink connectors combine solder, insulation, and a watertight seal in one step, giving you professional-grade wire repairs without a soldering iron.
- Self-soldering design creates a secure connection when heated with a heat gun
- Heat shrink tubing provides insulation, strain relief, and a weatherproof seal
- Built-in hot-melt adhesive blocks moisture and corrosion
- Tin-plated terminal ring for a durable, low-resistance joint
- Color-coded sizes for quick identification
- Ideal for marine, automotive, and household wiring repairs
Why choose these solder seal connectors
Weatherproof and moisture-resistant
Heat shrink tubing and built-in hot-melt adhesive combine to block moisture and corrosion, making these ideal for demanding environments.
Quick size identification
Color-coded connectors let you match the right size at a glance: white for 26-24 AWG, red for 18-22 AWG, blue for 16-14 AWG, and yellow for 12-10 AWG.
Built for tough repairs
Perfect for fixing or extending wires in vehicles, boats, trailers, and other places where a permanent, moisture-resistant connection matters.
Setup
How to make a waterproof splice
No electrician, no wiring, no fuss.
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Slide the connector on
Place the connector over the two wire ends you want to join, making sure they meet inside the solder ring.
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Heat with a heat gun
Apply heat evenly with a heat gun. The solder melts and flows around the wires, creating a secure connection.
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Let it seal
As the heat shrink tubing contracts, the built-in hot-melt adhesive activates, forming a weatherproof, corrosion-resistant seal.
Specs
The details that matter
Built to last outdoors, season after season.
- Quantity
- 800pcs
- Product Type
- Solder Seal Wire Connectors
- Size
- white (26-24 AWG), red (18-22 AWG), blue (16-14 AWG), yellow (12-10 AWG)
- Material
- Tin-plated terminal ring
- Color
- Color-coded
Comparison
Solder seal connectors vs. standard crimp connectors
Not all products in this category are built the same.
Feature
SmartPicksWorld
Typical alternative
Connection method
Self-soldering design that melts and bonds when heated with a heat gun
Requires a separate crimping tool and relies on mechanical pressure
Waterproofing
Heat shrink tubing plus built-in hot-melt adhesive blocks moisture and corrosion
Often lacks a seal, leaving connections exposed to moisture
Strain relief
Heat shrink tubing provides insulation and strain relief in one step
May need additional tape or sleeving for strain relief
Joint quality
Tin-plated terminal ring creates a durable, low-resistance joint
Crimp quality depends on tool calibration and technique
Size selection
Color-coded sizes for quick identification across four AWG ranges
Sizes may not be color-coded, requiring careful measurement
Our worry-free shopping promise
If your order arrives damaged, defective, or not as described, contact us within 14 days and we will make it right with a replacement or refund.
Frequently asked questions
Everything you might want to know before you order.
How do these solder seal connectors work?
Each connector contains a built-in solder ring and heat shrink tubing. When you heat it with a heat gun, the solder melts and flows around the wire ends to create a secure connection, while the tubing shrinks to insulate and seal the joint.
Do I need a soldering iron to use these connectors?
No. The self-soldering design activates with a heat gun, so you can make professional-grade splices without a soldering iron.
What wire sizes do the color-coded connectors fit?
The connectors are color-coded by size: white fits 26-24 AWG, red fits 18-22 AWG, blue fits 16-14 AWG, and yellow fits 12-10 AWG, so you can quickly pick the right one for your wire gauge.
Are these connectors waterproof?
Yes. The heat shrink tubing and built-in hot-melt adhesive create a weatherproof seal that blocks moisture and corrosion, making them ideal for marine, automotive, and household wiring repairs.
Where can I use these connectors?
They are ideal for fixing or extending wires in vehicles, boats, trailers, and other demanding environments where a permanent, moisture-resistant connection matters.
Shipping & returns
Shipping
- Delivers to United States (based on your selected country/region).
- Estimated delivery: 3–15 business days after dispatch.
- Shipping cost: Free.
Returns
You can request a return within 14 days after delivery. Standard returns have a €4.00 EUR (approximately $4.66 USD) flat-rate return shipping fee, deducted from your refund. Return shipping is free for items that arrived damaged, defective, or incorrect. Items should be unused and in original packaging where possible. Contact us before sending anything back.