Heat Shrink
3:1 and 4:1 Eco-Friendly Dual-Wall Tubing
High-ratio adhesive lined tubing for waterproofing, corrosion protection, insulation and sealing of harnesses, marine cables and metal pipes.
Heat Shrink
3:1 and 4:1 Eco-Friendly Dual-Wall Tubing
High-ratio adhesive lined tubing for waterproofing, corrosion protection, insulation and sealing of harnesses, marine cables and metal pipes.
Heat Shrink
Typical Parameters
| Parameter | Typical value |
|---|
| Material | Flame-retardant polyolefin outer layer with hot-melt adhesive inner layer |
|---|
| Working temperature | -45 C to 125 C |
|---|
| Voltage / dielectric | Electrical insulation protection, dielectric strength >=15 kV/mm |
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| Size range | 3:1 and 4:1 high shrink ratio series |
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| Structure | Eco-friendly dual-wall adhesive-lined heat shrink tubing |
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OEM note: Detailed size table, validation data and custom packing can be confirmed by project.
Why this product
- Supports OEM insulation, protection and routing requirements.
- Suitable for sourcing, engineering validation and sample review.
- Can be matched with your application temperature, voltage and routing needs.
Typical applications
- Automotive and EV electrical systems
- Motors, transformers and industrial equipment
- Wire harness, appliance and custom assembly projects
Frequently Asked Questions
Frequently Asked Questions
What is 3:1 and 4:1 Eco-Friendly Dual-Wall Tubing used for?
3:1 and 4:1 Eco-Friendly Dual-Wall Tubing is used for electrical insulation, cable branch covering, terminal protection, harness finishing and sealing or strain relief when the selected construction fits the project.
How should I compare 3:1 and 4:1 Eco-Friendly Dual-Wall Tubing options?
Compare shrink ratio, recovered size, wall type, adhesive requirement, environment, installation process and the validation standard required by the customer.
What should I send for 3:1 and 4:1 Eco-Friendly Dual-Wall Tubing samples?
Send the cable or terminal size, starting and recovered diameter target, length, color, sealing requirement, environment and expected assembly method.
What is the advantage of 3:1 and 4:1 shrink ratios in dual-wall tubing?
Higher shrink ratios (3:1 and 4:1) allow the tubing to cover parts with significant diameter variation, such as connector-to-cable transitions, splices and bulky terminals. The tubing shrinks from a large expanded ID down to a small recovered ID, ensuring full coverage and sealing across the diameter change.
Is 3:1 and 4:1 eco-friendly dual-wall tubing RoHS compliant?
Yes. WCW Flex 3:1 and 4:1 eco-friendly dual-wall tubing is UL 224 recognized and RoHS compliant. It has a high shrink ratio with a flame-retardant outer layer and UV resistance, with a dielectric strength of >=15 kV/mm.
What shrink temperatures does 3:1 and 4:1 dual-wall tubing use?
WCW Flex 3:1 and 4:1 eco-friendly dual-wall tubing has an onset shrink temperature of >=70 C and full recovery at >=125 C. The inner adhesive melts and flows during recovery to create an environmental seal around the protected part or splice.
