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Clear bag of 120 black heat-shrink solder butt connectors

Sopoby 120PCS Solder Seal Wire Connectors

SKU CH-A9VV-E4QZY

A 120-piece kit of heat-shrink solder-seal connectors that create waterproof, vibration-resistant joints for automotive and marine wiring

  • Certifications and standardsUL Listed
  • Product colorBlack
  • UL Listed solder-seal connectors create reliable waterproof joints
  • Dual-wall tubing with hot-melt adhesive seals out moisture and vibration
  • Heat-shrink ratio 2:1 protects cables from abrasion and cutting
  • Tin-plated barrel lowers voltage drop for stable current flow
  • 120-piece kit covers automotive marine and household wiring projects

120-Piece Solder Seal Wire Kit

This kit contains 120 heat-shrink butt connectors with an internal solder ring and adhesive lining. It is aimed at automotive, marine and general electrical repairs where a waterproof, vibration-resistant joint is required. The connectors are UL Listed and colour-coded for quick identification. Professional installers and DIY users alike can make sealed splices without separate crimp terminals.

Shrink and Melt Temperature Limits

The tubing begins to shrink at 80, the solder ring starts to melt at 111 and flows completely at 138. A hot-air gun set between 400 and 600 (752–1112°F) is recommended; the supplier suggests a 1500W unit. Exceeding this range risks burning the adhesive, while insufficient heat leaves the solder unmelted and the seal incomplete. The 2:1 shrink ratio is fixed by the tubing design.

Simple Heat-Gun Installation

Strip the wires, insert them into the connector, then apply heat until the tubing shrinks and the solder flows into the strands. The dual-wall construction seals automatically when the adhesive melts. Common faults are uneven heating that leaves cold-solder joints, or using a flame that scorches the polyolefin sleeve. A controlled hot-air gun avoids both problems.

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Price $12.99
Typical for this category: the median of 1,040 items is $13.99.

Specifications

Product
Product colorBlack
Environment & compliance
Certifications and standardsUL Listed

Questions about this item

How do I pick the right size from the 120-piece kit?

The kit contains 120 colour-coded connectors; match the colour to your wire gauge for the correct fit.

What does the 2:1 shrinkage ratio mean once the connector is heated?

The tubing shrinks to half its original diameter, forming a tight waterproof seal around the joint.

At what temperature does the solder ring melt completely during installation?

The solder ring melts fully at 138 °C, so a heat gun set between 400 and 600 °C ensures proper flow.

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