50/70/100Pcs Waterproof Solder Seal Heat Shrink Connectors
50/70/100Pcs Waterproof Solder Seal Heat Shrink Connectors
Waterproof Solder Seal Heat Shrink Butt Wire Connectors — 50, 70 & 100-Piece Packs
Make secure, waterproof wire connections fast with these Solder Seal Heat Shrink Butt Connectors. Each connector combines a copper solder ring and a heat-shrink sleeve in one — just insert the wires, apply heat, and the sleeve shrinks while the solder ring melts and bonds, creating a moisture-proof, gas-tight connection every time. Perfect for automotive wiring, marine projects, home electrical repairs, and any application that demands a reliable, long-lasting joint.
Key Features
- All-in-One Design: Heat-shrink sleeve + tin solder ring in a single connector — no separate solder or flux needed.
- Waterproof & Insulated: Sealed construction keeps moisture, dust, and corrosion out for a durable connection.
- Strong Conductivity: Copper tape solder sleeve ensures excellent electrical conductivity and a solid bond.
- Rapid High-Temperature Shrink: Starts shrinking at just 80°C, locks in at >160°C — quick and easy with a heat gun or lighter.
- Wide Temperature Range: Rated to operate from -10°C to 100°C, suitable for both indoor and outdoor environments.
- Multiple Pack Sizes: Choose 50, 70, or 100-piece packs with multiple wire-gauge sizes to cover every job.
- Convenient Storage: Compact packaging keeps connectors organized and ready to use.
Technical Specifications
| Working Temperature | -10°C to 100°C |
| Starting Shrinkage Temperature | 80°C |
| Full Shrinkage Temperature | >160°C |
| Tin Ring Dissolution Temperature | 220°C |
| Dielectric Strength | 1 KW |
| Material | Plastic sleeve with copper tin solder ring |
| Pack Quantities | 50 / 70 / 100 pcs |
Ideal Applications
- Automotive & motorcycle wiring repairs
- Marine & boat electrical systems
- Home & garden outdoor wiring
- DIY electronics projects
- RV & trailer wiring
Made in Mainland China.
Looking for more useful workshop and home tools? Check out our Multi-Use Faucet Bubbler Wrenches, our Silicone Sealant Scraper Set, and our High Grade Silicone Grease Lubricant for all your repair and maintenance needs.
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Frequently Asked Questions
Q: What wire gauges do these solder seal heat shrink connectors support?
A: The pack includes multiple sizes of solder seal heat shrink connectors to accommodate a range of wire gauges. Please refer to the product images for exact size charts so you can choose the right connector for your specific wire diameter.
Q: Can I use a regular lighter instead of a heat gun with these solder seal connectors?
A: Yes — since shrinkage begins at 80°C, a standard lighter or small butane torch can activate the heat shrink sleeve. For best results and even heat distribution, a heat gun is recommended, especially on larger wire gauges.
Q: Are these waterproof solder connectors suitable for outdoor or marine use?
A: Absolutely. The sealed heat-shrink design creates a waterproof, moisture-resistant barrier around the joint, making these connectors excellent for outdoor wiring, automotive, marine, and any other environment where the connection may be exposed to moisture or humidity.
Q: Do I need flux or extra solder to use these connectors?
A: No additional solder or flux is needed. Each connector already contains a pre-loaded tin solder ring that melts and flows around the wires when heat is applied, creating a clean, reliable bond in one easy step.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.