1. Product Overview
The CHANZON Heat Shrink Tubing Kit provides a versatile solution for insulating, protecting, and repairing electrical wires and components. This kit includes 172 pieces of polyolefin heat shrink tubing in multiple colors and sizes, offering excellent abrasion resistance, thermoresistance, and flexibility.

Figure 1: CHANZON Heat Shrink Tubing Kit showing various sizes and colors, along with packaging details.
2. Safety Warnings and Compliance
2.1 Thermal Burn and Fire 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.
2.2 Ventilation and Health 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.
2.3 Child Safety 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.
2.4 Compliance Markings
This product complies with relevant EU regulatory requirements:
- 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.

Figure 2: Product certifications including UL Listed, RoHS, Lead-free, SGS, ISO, Reach, and cURus E203950.
3. Setup and Preparation
- Select Tubing Size: Choose a heat shrink tube with an inner diameter larger than the object to be covered before heating. Refer to the specifications table for available sizes.
- Prepare Surface: Ensure the surface of the object to be covered is clean, dry, and free of oil or grease.
- Cut Tubing: Cut the heat shrink tubing to the desired length using sharp scissors or a utility knife.
- Position Tubing: Slide the heat shrink tubing onto the designated position of the object to be covered.
4. Operating Instructions
4.1 Recommended Tools
- Heat Gun: This is the recommended tool for even and controlled shrinkage.
- Lighter/Candle: Can be used for smaller applications, but exercise extreme caution to avoid direct scorching. Keep the flame approximately 1cm from the tubing.
4.2 Heating Procedure
- Apply Heat Uniformly: Begin heating from the center of the tubing and apply heat uniformly around the circumference, then gradually move toward both ends. Alternatively, heat uniformly while moving steadily from one end to the other to expel trapped air and ensure even, smooth shrinkage.
- Avoid Overheating: Refer to the 'Shrinkage Temperature' specified in the specifications section. Avoid prolonged direct heat application to prevent damage to the tubing or the underlying component.
- Rotate Tubing (if applicable): For cylindrical objects, rotate the object or the heat source to ensure even heat distribution.
4.3 Cooling
Allow the tubing to cool naturally to set its shape. Do not move or compress it during cooling to ensure a secure and durable seal.

Figure 3: Step-by-step guide for using heat shrink tubing: 1) Pick size and cut, 2) Insert wire, 3) Apply heat while rotating, 4) Obtain durable insulation.
Video 1: Demonstration of heat shrink tubing application using various heat sources (lighter, heat gun) and for different purposes, including cable repair, glasses arm protection, and wire insulation.
5. Usage Limitations
- Do not use in applications exceeding its rated temperature, voltage (600V), or environmental specifications.
- Do not use as a load-bearing or structural component.
- Not suitable for long-term exposure to ultraviolet radiation (e.g., direct sunlight), ozone, corrosive chemicals, or extreme mechanical stress—unless the product specifications explicitly state corresponding protection ratings (e.g., UV-resistant, oil-resistant).
- Must not substitute dedicated safety protective devices (e.g., equipment enclosures).
6. Maintenance
Heat shrink tubing, once applied, requires no specific maintenance. For unused tubing, store in a cool, dry place away from direct sunlight to preserve its properties.
7. Troubleshooting
7.1 Uneven Shrinkage
If the tubing shrinks unevenly, it may be due to inconsistent heat application. Ensure heat is applied uniformly around the circumference and along the length of the tubing. Using a heat gun with a consistent airflow can help achieve better results.
8. Specifications
| Property | Value |
|---|---|
| Brand Name | CHANZON |
| Model Number | 2 To 1 Abrasion Resistant Temperature Thermoresistant Moisture Seal |
| Type | Insulation Sleeving |
| Material | Polyolefin (EVA Cord Temp Shrink-Wrap Seal Protection Protect Automotive Audio) |
| Shrinkage Ratio | 2:1 |
| Rated Voltage | 600V |
| Temperature Rating | 125°C |
| Shrinkage Temperature | -55-105℃ (for transparent) | -55-125℃ (for other colors) |
| Flammability | VW-1 |
| Application | High Temperature, Electrical Insulation, Wire Protection, Cable Repair |
| Certificates | UL, RoHS, REACH, SGS, ISO, cURus E203950 |
| Highlights | Abrasion Resistant, Thermoresistant, Flexibility, 1 Second Shrink, Tighter Wire Grip, High Strength Seal, Lower Shrink Temperature, 6 Multi Colors, 8 Sizes |
8.1 Size and Quantity Breakdown

Figure 4: Detailed breakdown of tubing diameters, quantities, and lengths included in the kit.
| Size (mm) | Non-recovered Diameter (mm) | Non-recovered Wall Thickness (mm) | After Recovery Diameter (mm) | After Recovery Wall Thickness (mm) | Scope of Application (mm) | Length (mm) | Quantity (pcs) |
|---|---|---|---|---|---|---|---|
| 1 | 1.50 ± 0.2 | 0.20 ± 0.05 | ≤ 0.65 | 0.36 ± 0.10 | 0.75 ~ 1.00 | 30 | 50 |
| 2 | 2.50 ± 0.2 | 0.20 ± 0.05 | ≤ 1.00 | 0.45 ± 0.10 | 1.10 ~ 1.80 | 30 | 25 |
| 4 | 4.70 ± 0.2 | 0.25 ± 0.05 | ≤ 2.00 | 0.45 ± 0.10 | 2.20 ~ 3.40 | 40 | 25 |
| 6 | 6.50 ± 0.2 | 0.28 ± 0.05 | ≤ 3.00 | 0.56 ± 0.10 | 3.30 ~ 5.00 | 40 | 25 |
| 8 | 8.50 ± 0.3 | 0.30 ± 0.08 | ≤ 4.00 | 0.56 ± 0.10 | 4.40 ~ 6.50 | 40 | 20 |
| 10 | 10.5 ± 0.3 | 0.30 ± 0.08 | ≤ 5.00 | 0.56 ± 0.10 | 5.50 ~ 8.10 | 80 | 12 |
| 16 | 16.5 ± 0.4 | 0.35 ± 0.10 | ≤ 8.00 | 0.70 ± 0.10 | 8.80 ~ 12.9 | 80 | 10 |
| 20 | 22.0 ± 0.5 | 0.40 ± 0.10 | ≤ 10.00 | 0.83 ± 0.10 | 11.0 ~ 16.8 | 80 | 5 |
9. User Tips
- Cable Repair: Use smaller diameter tubing to repair frayed charging cables or headphone wires, providing a durable and flexible protective layer.
- Tool Handle Grip: Apply heat shrink tubing to the handles of small tools (e.g., screwdrivers, pliers) for improved grip and insulation.
- Glasses Arm Protection: Small diameter tubing can be used to cover and protect the arms of eyeglasses, making them more comfortable and preventing wear.
- Color-Coding: Utilize the multi-colored tubing to color-code wires in complex electrical setups for easier identification and organization.
- Waterproofing: When properly shrunk, the tubing can provide a degree of moisture resistance for connections, though it is not designed for full waterproofing unless specified.
10. Warranty and Support
For warranty information and customer support, please refer to the seller or manufacturer's official website. Keep your proof of purchase for any warranty claims.