Product Overview
The CHANZON 4:1 Heat Shrink Tubing is a versatile solution for electrical insulation, wire bundling, and environmental sealing. Featuring a 4:1 shrink ratio and an adhesive lining, it provides a secure, waterproof seal, making it ideal for marine, automotive, and general electrical applications. This product is designed for high-temperature environments and offers excellent abrasion resistance.

Setup and Application
1.1 Proper Usage
- Sizing: The inner diameter of the selected heat shrink tubing must be larger than the diameter of the object to be covered prior to heating and shrinking.
- Preparation: Ensure the surface of the object to be covered is clean, dry, and free of oil or grease.
- Placement: Slide the heat shrink tubing onto the designated position of the object to be covered.
Heating and Shrinking
Recommended Tool: A heat gun is recommended for heating. Do not use an open flame (e.g., a lighter) to directly scorch the tubing, as this may cause burning or uneven shrinkage.
Heating Procedure:
- Begin heating from the center of the tubing and apply heat uniformly around the circumference.
- Gradually move the heat source toward both ends.
- Alternatively, heat uniformly while moving steadily from one end to the other to expel trapped air and ensure even, smooth shrinkage.
Heating Temperature: Refer to the "Shrink Temperature" specified on the product packaging or label (e.g., -55°C to 125°C). Avoid overheating.
Cooling: Allow the tubing to cool naturally to set its shape. Do not move or compress it during cooling.


Specifications
| Attribute | Detail |
|---|---|
| Brand Name | CHANZON |
| Type | Insulation Sleeving |
| Material | Polyolefin |
| Shrinkage Ratio | 4:1 |
| Rated Voltage | 600V |
| Application | High Temperature |
| Shrinkage Temperature | -55°C to 105°C (transparent) | -55°C to 125°C (other colors) |
| Features | Abrasion Resistant, Thermoresistant, Environmental Protection, Non-toxic, Flexibility, Uniform Shrinkage, 1 Second Shrink, Lower Shrink Temperature, Tighter Wire Grip, High Strength Seal |
| Certificates | UL, RoHS, REACH, SGS |
| Origin | Mainland China |
| Package Weight | 0.695 kg |
Available Sizes

The heat shrink tubing is available in various inner diameters from 4mm to 52mm. Please refer to the size chart above for detailed specifications on non-recovered diameter, recovered diameter, total wall thickness, and adhesive thickness for each size.

Compliance Markings
This product complies with relevant EU regulatory requirements. The following markings appear on its packaging or smallest sales unit:
- CE marking: Indicates conformity with EU safety, health, and environmental protection requirements.
- RoHS Directive 2011/65/EU: Restriction of Hazardous Substances in Electrical and Electronic Equipment.
- REACH Regulation (EC) No 1907/2006: Registration, Evaluation, Authorisation and Restriction of Chemicals.

Safety Information and Warnings
Usage Limitations
- Do not use in applications exceeding its rated temperature, voltage (600 V), or environmental specifications.
- Do not use as a load-bearing or structural component.
- Not suitable for long-term exposure to ultraviolet radiation, ozone, corrosive chemicals, or extreme mechanical stress, unless explicitly stated as UV-resistant or oil-resistant in product specifications.
- Must not substitute dedicated safety protective devices (e.g., equipment enclosures).
Thermal Burn and Fire Warning
Warning:
- During heating, the heat shrink tubing, covered components, and heating tool itself reach extremely high temperatures, posing serious risks of thermal burns and fire.
- Always wear heat-resistant gloves when operating, and perform heating in a well-ventilated work area away from flammable or explosive materials.
- Never touch heated components immediately after heating; wait until they have fully cooled.
- After use, place the heating tool on a non-combustible, dedicated stand to cool.
Ventilation and Health Warning
Warning:
- Heating certain materials may release trace amounts of smoke or fumes.
- Ensure adequate ventilation in the workplace and avoid prolonged inhalation. Individuals sensitive to specific materials should implement additional protective measures.
Child Safety Warning
Warning:
- Not suitable for children under 3 years. The product itself or its packaging may contain small parts, posing a choking hazard.
- To be used under the direct supervision of an adult. Children must not approach or operate heating equipment.
Maintenance
This product requires no specific maintenance. Store unused tubing in a cool, dry place away from direct sunlight to preserve its properties.
Troubleshooting
If the heat shrink tubing does not shrink properly or evenly:
- Ensure the correct size of tubing was selected (inner diameter larger than the object before shrinking).
- Verify that the surface of the object is clean and dry.
- Check that the heat gun is operating at the appropriate temperature.
- Apply heat uniformly and gradually, moving from the center outwards to avoid trapping air.
- Avoid using an open flame, which can cause uneven shrinking or damage.
User Tips
- For best results, use a heat gun with adjustable temperature settings to match the recommended shrink temperature.
- When working with multiple wires, consider using different colored heat shrink tubing for easy identification and organization.
- Pre-cut tubing to the desired length before heating to ensure a clean finish.
- Always test a small piece of tubing on a scrap wire first to get a feel for the shrinking process and optimal heat application.
Warranty and Support
For product support, technical assistance, or warranty inquiries, please contact CHANZON Tech Store directly. Specific warranty details may be available on the product packaging or through the seller at the time of purchase.
A detailed user manual in PDF format is also available for download: View User Manual (PDF)