100 Pieces Heat Shrink Butt Wire Connectors Kit – Insulated Waterproof Terminals

Upgrade your electrical splices with a complete, ready-to-use kit designed for durable, weatherproof connections. This 100-piece set bundles three commonly used sizes in a single package, making it perfect for automotive, marine, outdoor lighting, and general electronics projects where reliability matters.

Key features that set this kit apart

• Dual-walled design: each connector features an outer polyolefin tubing paired with an inner hot-melt adhesive. When heated, the outer sleeve shrinks tightly around the crimp, while the adhesive flows to fill gaps and seal the joint.
• Waterproof and corrosion-resistant: the adhesive-filled seal blocks moisture and contaminants, extending the life of the connection in harsh environments.
• Clear visual inspection: the heat-shrink sleeve allows you to verify a proper crimp visually before the final seal forms, giving you confidence in every splice.
• Color-coded sizes for easy identification: Red, Blue, and Yellow indicate different wire ranges, helping you pick the right connector quickly on the job.
• Wire size coverage: Red fits 0.5–1.5 mm² (18–22 AWG), Blue fits 1.5–2.5 mm² (16–14 AWG), Yellow fits 4.0–6.0 mm² (12–10 AWG).
• Quantity and organization: 100 pieces total (40 red, 40 blue, 20 yellow) provide ample spares for multi-seat projects or ongoing maintenance.
• New, reliable construction: each connector is fresh and in good condition, ready for immediate use.

How to get the best seal

1. Fully crimp the wire with a proper crimping tool to ensure a solid mechanical connection.
2. Apply heat evenly with a hot air gun from a comfortable distance until the sleeve shrinks to the wire and the inner adhesive flows to fill all gaps.
3. Allow the adhesive to cure for a moment before handling to ensure a water-tight seal.

Ideal applications

• Automotive wiring including sensors, lighting, and power circuits where vibration and moisture are concerns.
• Marine electrical installations exposed to rain, spray, and humidity.
• Outdoor lighting and weatherproof power connections for decks, sheds, and gardens.
• Any DIY electronics project that benefits from a clean, inspectable, water-resistant splice.

Contents at a glance: 100 pieces total — 40 red (0.5–1.5 mm² / 18–22 AWG), 40 blue (1.5–2.5 mm² / 16–14 AWG), 20 yellow (4.0–6.0 mm² / 12–10 AWG).

Packaging note: compatible with standard crimping tools and hot air application, designed to deliver professional-grade waterproof seals without specialized equipment.