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Solder sealed terminals, also known as solder seal wire connectors, are all-in-one electrical splicing terminals that integrate soldering, insulation and environmental sealing into a single component. Designed for quick, reliable and waterproof wire-to-wire connections, they eliminate the need for extra soldering irons or crimping tools, greatly improving on-site installation efficiency.
Each terminal is constructed with a built-in low-melting-point solder ring inside and a dual-wall heat shrink insulating sleeve outside. When heated evenly with a heat gun, the internal solder ring melts to fuse stripped wire conductors firmly together, forming a stable, low-resistance electrical joint. At the same time, the outer polyolefin tubing shrinks tightly around the wire, and the inner hot-melt adhesive layer forms a fully airtight and waterproof seal. This integrated structure effectively blocks moisture, dust and corrosive elements from the connection point, ensuring long-term reliable performance even in harsh working environments.
No crimping operation is required. Simply strip both wire ends, insert them into the terminal from opposite sides, and apply uniform heat to complete the connection. Multiple color-coded sizes are available to match different wire gauge ranges, allowing fast size identification and selection. These solder sealed terminals are widely applied in automotive wiring harnesses, marine electrical systems, outdoor lighting fixtures, solar power installations and various industrial equipment wiring projects.
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A: We are a professional manufacturer with our own factory.
A: Most standard products are in stock for fast shipping.
A: We do not provide free samples, but you can order directly online.
A: We accept customization, but a minimum order quantity is required. Please contact us for details.
A: Most of our products have CE and RoHS certifications. Some products also have UL certification.
At CYD, we believe every connection has a purpose — a spark that brings ideas to life. Our journey began with one mission: to provide dependable, high-performance cable terminals that make building, repairing, and creating easier and safer for everyone.
Engineered for Excellence
From the beginning, we’ve committed ourselves to the highest international standards. Every product we create — whether for industrial machines, automotive systems, or home wiring — reflects our dedication to safety, efficiency, and stability. With certifications including CE, UL, ISO,and RoHS, our quality speaks for itself.
Built on Trust, Driven by Innovation
CYD’s experienced engineering team continuously develops new solutions to meet the evolving needs of customers across the globe. We’re not just manufacturers — we’re problem solvers. By combining smart design with practical functionality, we help our customers build stronger, more reliable electrical systems.
From Local Expertise to Global Reach
Today, CYD terminals and connectors are trusted by professionals and DIYers in the EU, United States, Russia, and beyond. Our products serve as the invisible link powering countless innovations — and we’re proud to be part of that process.
CYD – Connect your dreams
Whether it’s a workshop project or an industrial installation, we’re here to help you bring your ideas to life — one connection at a time.
Looking Forward, Together
We see every customer not just as a buyer, but as a partner. That’s why we provide not only reliable products, but also responsive service and fast global shipping. As we grow, our promise stays the same: to help you move forward with confidence, quality, and the right connection.
