Automotive heat-shrink tubing designed to create waterproof, durable seals for wiring and cable joins. sourcing map Heat Shrink Tubing uses a 4:1 shrink ratio and hot-melt inner adhesive to form tight, long-lasting seals. Is this kit the right choice for workshop repairs and industrial cable work?
⚡ At a Glance
- • Sealing Performance: Hot-melt inner layer forms a waterproof, dustproof seal after heat shrinkage
- • Best for: Automotive wiring, solder joint protection and electronic assembly tasks
- • Not ideal for: Very small-gauge wires or sub-millimetre connector work
Large-diameter PE tubing uses a 4:1 heat-shrink ratio with an inner hot-melt adhesive. Suited to medium and large cable joints that require a waterproof, mechanically secure finish.
Waterproof Seals – With hot-melt inner adhesive
Inner layer is made of hot-melt material that liquefies when heated and spreads evenly over the connection to form a bonding layer. The adhesive fills gaps and cures to create a moisture- and dust-resistant barrier.
Creates reliable waterproof and dustproof seals on solder joints and cable terminations, reducing corrosion risk and improving longevity.
High Fit and Strain Relief – Thanks to 4:1 heat shrink ratio
A 4:1 shrink ratio means the sleeve can reduce to one quarter of its original diameter when heated, allowing it to conform tightly to irregular shapes and connectors. Even shrink and concentrated heat produce a snug mechanical wrap.
Provides a secure mechanical grip and neat finish on uneven joins, helping prevent movement and cable fatigue at connection points.
Durable Insulation – With PE construction and heat resistance
Polyethylene construction delivers reliable electrical insulation and tolerates higher operating temperatures compared with standard plastics. The material resists ageing and maintains its insulating properties over time.
Keeps electrical connections insulated and protected in automotive and industrial environments, extending service life of repaired joints.
✨ The 4 Key Reasons for sourcing map Heat Shrink Tubing
- 4:1 Shrink Ratio — Ensures tight fit across a broad range of connector sizes
- Hot-melt Inner Layer — Forms waterproof, dustproof bonds once heated and cured
- Large 24mm Inner Diameter — Covers bulky cable joints and multi-core connector assemblies securely
- Includes End Caps — Provides sealed terminations for open cable ends without extra parts
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Shrink ratio: 4:1
- Inner diameter: 24mm / 0.94 inch
- Flat width: 40mm / 1.57 inch
- Length per piece: 1m / 3.28 ft
❓ Frequently Asked Questions
Q: Is the tubing waterproof once shrunk?
A: Yes, the inner hot-melt layer melts when heated and distributes to form a waterproof and dustproof sealing layer.
Q: What sizes and quantities are included?
A: Each sleeve has an inner diameter of 24mm and a length of 1m; the package contains 3 tubing pieces and 6 end caps.
Q: How should the tubing be installed?
A: Place the sleeve so it fully covers the connection, heat evenly while moving the heat source back and forth until the sleeve shrinks and the inner adhesive flows to seal the joint.
🏆 Our Verdict
Suitable for DIYers, electricians and automotive technicians working with medium to large cable joints. The combination of a 4:1 shrink ratio and a hot-melt inner adhesive delivers reliable, waterproof seals and strong mechanical support. Durable PE construction and included end caps make the kit a practical, value-focused choice for workshop and industrial use.
