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China Suppliers of Excellent Flame Retardancy PE Heat Shrink Tube - Reliable Factory for Quality Solutions
Features
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Excellent Electrical Insulation
• Provides superior insulation, with a standard voltage rating of up to 600V, effectively preventing current leakage and short circuits.
• High dielectric strength meets the insulation requirements for most low to medium voltage electrical environments. -
Good Flame Retardancy and Safety
• Products can achieve UL VW-1 or higher flame retardancy ratings through added flame retardants, being self-extinguishing and effectively slowing flame spread to enhance electrical safety.
• Some eco-friendly models ensure no harm to humans or the environment during use and disposal. -
Broad Operating Temperature Range
• Standard models have a continuous operating temperature range from -55°C to +125°C, suitable for most indoor and outdoor temperature variations.
• High-temperature enhanced models can withstand up to +135°C or even +150°C, catering to applications in high-temperature environments like engine compartments. -
Reliable Shrinkage and Mechanical Protection
• The standard shrinkage ratio is typically 2:1 (meaning the inner diameter halves after shrinking), ensuring a tight, uniform fit around objects of various shapes upon heating.
• After shrinkage, it provides good mechanical protection, enhancing the abrasion and cut resistance of wire harnesses and preventing corrosion on metal parts.
• The material is soft and elastic, facilitating bending and installation in complex routing situations. -
Outstanding Environmental Compliance and Certifications
• Mainstream products comply with EU environmental directives such as ROHS and REACH, being free of harmful substances like lead, cadmium, and mercury.
• Certified by international safety standards like UL and CSA which fully satisfying export requirements. -
Diverse Functional Designs
• In addition to standard single-wall tubing, dual-wall adhesive-lined tubing is available. The inner layer of hot-melt adhesive melts during shrinkage, providing excellent waterproofing, moisture resistance, and sealing, ideal for outdoor or humid environments.
• Available in various colors including black, red, yellow, green, and blue, facilitating circuit phase identification or product categorization.
Characteristics
| Property | Testing Condition | Index |
| Physical: Tensile Strength | UL224 | ≥10.4 Mpa / UL224 |
| Breakage Elongation | UL224 | ≥200% |
| Tensile Strength after aging | 158±1℃, 168hr / UL224 | ≥7.3 Mpa / UL224 (Not smaller 70% than before aged) |
| Breakage Elongation after aging | 158±1℃, 168hr / UL224 | ≥100% Tensile Ratio |
| Heat Shock | 250℃, 1hr / UL224 | No cracking |
| Cold Bend | -30℃, 1hr / UL224 | No cracking |
| Electrical: Dielectric Voltage Withstand | 2500V, 60sec / UL224 | No breakdown |
| Volume Resistivity | UL224 | ≥1014 Ω.cm |
| Chemical: Copper Stability | 158±1℃, 168hr / UL224 | Pass |
| Flammability | VW-1 / UL224 (within 15S, 60S self-extinguish) | Pass |
Applications
◎ Electronics, Electrical & Communications: Insulation protection and bundling for various wire harnesses and terminals; encapsulation of components like resistors, capacitors, and inductors; mechanical and electrical isolation of solder joints; antenna protection.
◎ Automotive Industry: Insulation protection for wiring harnesses in new energy and traditional vehicles; connection protection for battery modules; wrapping for sensor cables; waterproof sealing for cable joints.
◎ Power & Electrical: Insulation restoration for low-voltage cable joints and terminations; insulation protection for busbars; anti-corrosion coating for electrical hardware.
◎ Household Appliances: Insulation reinforcement and organization for internal power cords and motor leads.
◎ Military & Marine: Moisture-proof, mildew-proof, and insulation treatment for internal equipment cables; anti-corrosion protection for metal pipes and rods.
Usage and Selection Guide
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Selection Steps
• Determine Size: Measure the maximum outer diameter of the object to be protected. Select a product with a pre-shrink inner diameter 20%–30% larger. Confirm the required final tightly-fitted inner diameter after shrinkage.
• Confirm Performance: Determine the required operating temperature rating, flame retardancy rating (e.g., VW-1), voltage rating, and whether waterproof sealing is needed (choose dual-wall adhesive-lined tubing) based on the application environment.
• Choose Color & Certification: Select color based on identification needs and confirm the product possesses the necessary safety and environmental certifications. -
Shrinkage Process
• Tools: A heat gun, oven, or propane torch is recommended for even heating.
• Procedure: Slide the heat shrink tubing onto the object. Apply heat evenly from the middle towards the ends or from one end to the other. Avoid prolonged concentrated heat on one spot to prevent burning through or charring.
• Completion: Heating is complete when the tubing is fully shrunk, with a smooth, flat surface tightly conforming to the object without bubbles or wrinkles.
Product Specification Sheet
| Specification | Before Contraction (mm) | After Contraction (mm) | Packing (Length) M | Usage Range (mm) | ||
| Inner Diameter (D) | Avg Wall Thickness (r) | Inner Diameter (d) | Wall Thickness (t) | |||
| Φ0.6 | 0.9±0.2 | 0.15±0.03 | ≤0.40 | 0.28±0.06 | 400±3 | 0.4—0.7 |
| Φ0.7 | 0.9±0.2 | 0.15±0.03 | ≤0.45 | 0.28±0.06 | 400±3 | 0.5—0.7 |
| Φ0.8 | 1.1±0.2 | 0.15±0.03 | ≤0.50 | 0.30±0.06 | 400±3 | 0.6—0.8 |
| Φ1.0 | 1.5±0.2 | 0.18±0.03 | ≤0.60 | 0.36±0.08 | 400±3 | 0.75—0.9 |
| Φ1.5 | 2.0±0.3 | 0.18±0.03 | ≤0.85 | 0.36±0.08 | 400±3 | 0.95—1.4 |
| Φ2.0 | 2.5±0.3 | 0.20±0.04 | ≤1.00 | 0.40±0.08 | 400±3 | 1.1—1.8 |
| Φ2.5 | 3.0±0.3 | 0.20±0.04 | ≤1.25 | 0.40±0.08 | 400±3 | 1.35—2.3 |
| Φ3.0 | 3.5±0.4 | 0.20±0.04 | ≤1.5 | 0.40±0.08 | 400±3 | 1.6—2.7 |
| Φ3.5 | 4.0±0.4 | 0.22±0.04 | ≤1.75 | 0.44±0.08 | 400±3 | 1.85—3.2 |
| Φ4.0 | 4.5±0.4 | 0.25±0.04 | ≤2.0 | 0.50±0.08 | 400±3 | 2.1—3.6 |
| Φ4.5 | 5.0±0.4 | 0.25±0.04 | ≤2.25 | 0.50±0.08 | 200±2 | 2.35—4.0 |
| Φ5.0 | 5.5±0.4 | 0.25±0.04 | ≤2.5 | 0.50±0.08 | 200±2 | 2.6—4.5 |
| Φ5.5 | 6.0±0.4 | 0.25±0.04 | ≤2.75 | 0.50±0.08 | 200±2 | 2.8—5.5 |
| Φ6.0 | 6.5±0.4 | 0.28±0.04 | ≤3.0 | 0.55±0.08 | 200±2 | 3.1—5.4 |
| Φ6.5 | 7.0±0.4 | 0.28±0.04 | ≤3.25 | 0.55±0.08 | 100±1 | 3.2—6.0 |
| Φ7.0 | 7.5±0.4 | 0.28±0.04 | ≤3.5 | 0.55±0.08 | 100±1 | 3.7—6.3 |
| Φ8.0 | 8.5±0.5 | 0.28±0.04 | ≤4.0 | 0.60±0.10 | 100±1 | 4.2—7.2 |
| Φ9.0 | 9.5±0.5 | 0.30±0.05 | ≤4.5 | 0.60±0.10 | 100±1 | 4.7—8.0 |
| Φ10 | 10.5±0.5 | 0.30±0.05 | ≤5.0 | 0.60±0.10 | 100±1 | 5.2—9.0 |
| Φ11 | 11.5±0.5 | 0.30±0.05 | ≤5.5 | 0.60±0.10 | 100±1 | 5.7—10 |
| Φ12 | 12.5±0.5 | 0.30±0.05 | ≤6.0 | 0.60±0.10 | 100±1 | 6.2—11 |
| Φ13 | 13.5±0.5 | 0.35±0.06 | ≤6.5 | 0.70±0.10 | 100±1 | 6.7—12 |
| Φ14 | 14.5±0.5 | 0.35±0.06 | ≤7.0 | 0.70±0.10 | 100±1 | 7.3—13 |
| Φ15 | 15.5±0.5 | 0.40±0.08 | ≤7.5 | 0.75±0.10 | 100±1 | 7.8—14 |
| Φ16 | 16.5±0.5 | 0.40±0.08 | ≤8.0 | 0.75±0.10 | 100±1 | 8.3—15 |
| Φ17 | 17.5±0.5 | 0.40±0.08 | ≤8.5 | 0.75±0.10 | 100±1 | 8.8—16 |
| Φ18 | 19.0±0.7 | 0.40±0.08 | ≤9.0 | 0.75±0.10 | 100±1 | 9.3—17 |
| Φ20 | 21.0±0.7 | 0.40±0.08 | ≤10.0 | 0.75±0.10 | 100±1 | 10.4—19 |
| Φ22 | 23.0±0.7 | 0.40±0.08 | ≤11.0 | 0.80±0.10 | 100±1 | 11.4—21 |
| Φ25 | 26.0±0.7 | 0.50±0.10 | ≤12.5 | 0.90±0.10 | 50±0.5 | 12.8—24 |
| Φ28 | 29.0±0.7 | 0.50±0.10 | ≤14.0 | 0.90±0.10 | 50±0.5 | 14.4—29 |
| Φ30 | 31.0±0.7 | 0.50±0.10 | ≤15.0 | 0.95±0.10 | 50±0.5 | 16—29 |
| Φ35 | 36.0±0.7 | 0.50±0.10 | ≤17.5 | 1.00±0.12 | 50±0.5 | 18—34 |
| Φ40 | 41.0±0.7 | 0.55±0.10 | ≤20.0 | 1.00±0.12 | 50±0.5 | 21—39 |
| Φ45 | 46.0±0.7 | 0.55±0.10 | ≤22.5 | 1.00±0.12 | 25±0.5 | 23—44 |
| Φ50 | 51.0±0.7 | 0.55±0.10 | ≤25.0 | 1.00±0.12 | 25±0.5 | 26—49 |
| Size | Before Contraction (mm) | After Contraction (mm) | Packing (Length) M | Usage Range (mm) | ||
| Inner Diameter (D) | Avg Wall Thickness (r) | Inner Diameter (D) | Wall Thickness (t) | |||
| Φ0.6 | 0.9±0.2 | 0.15±0.03 | ≤0.40 | 0.28±0.06 | 400±3 | 0.4—0.7 |
| Φ0.7 | 0.9±0.2 | 0.15±0.03 | ≤0.45 | 0.28±0.06 | 400±3 | 0.5—0.7 |
| Φ0.8 | 1.1±0.2 | 0.15±0.03 | ≤0.50 | 0.30±0.06 | 400±3 | 0.6—0.8 |
| Φ1.0 | 1.5±0.2 | 0.18±0.03 | ≤0.60 | 0.36±0.08 | 400±3 | 0.75—0.9 |
| Φ1.5 | 2.0±0.3 | 0.18±0.03 | ≤0.85 | 0.36±0.08 | 400±3 | 0.95—1.4 |
| Φ2.0 | 2.5±0.3 | 0.20±0.04 | ≤1.00 | 0.40±0.08 | 400±3 | 1.1—1.8 |
| Φ2.5 | 3.0±0.3 | 0.20±0.04 | ≤1.25 | 0.40±0.08 | 400±3 | 1.35—2.3 |
| Φ3.0 | 3.5±0.4 | 0.20±0.04 | ≤1.5 | 0.40±0.08 | 400±3 | 1.6—2.7 |
| Φ3.5 | 4.0±0.4 | 0.22±0.04 | ≤1.75 | 0.44±0.08 | 400±3 | 1.85—3.2 |
| Φ4.0 | 4.5±0.4 | 0.25±0.04 | ≤2.0 | 0.50±0.08 | 400±3 | 2.1—3.6 |
| Φ4.5 | 5.0±0.4 | 0.25±0.04 | ≤2.25 | 0.50±0.08 | 200±2 | 2.35—4.0 |
| Φ5.0 | 5.5±0.4 | 0.25±0.04 | ≤2.5 | 0.50±0.08 | 200±2 | 2.6—4.5 |
| Φ5.5 | 6.0±0.4 | 0.25±0.04 | ≤2.75 | 0.50±0.08 | 200±2 | 2.8—5.5 |
| Φ6.0 | 6.5±0.4 | 0.28±0.04 | ≤3.0 | 0.55±0.08 | 200±2 | 3.1—5.4 |
| Φ6.5 | 7.0±0.4 | 0.28±0.04 | ≤3.25 | 0.55±0.08 | 100±1 | 3.2—6.0 |
| Φ7.0 | 7.5±0.4 | 0.28±0.04 | ≤3.5 | 0.55±0.08 | 100±1 | 3.7—6.3 |
| Φ8.0 | 8.5±0.5 | 0.28±0.04 | ≤4.0 | 0.60±0.10 | 100±1 | 4.2—7.2 |
| Φ9.0 | 9.5±0.5 | 0.30±0.05 | ≤4.5 | 0.60±0.10 | 100±1 | 4.7—8.0 |
| Φ10 | 10.5±0.5 | 0.30±0.05 | ≤5.0 | 0.60±0.10 | 100±1 | 5.2—9.0 |
| Φ11 | 11.5±0.5 | 0.30±0.05 | ≤5.5 | 0.60±0.10 | 100±1 | 5.7—10 |
| Φ12 | 12.5±0.5 | 0.30±0.05 | ≤6.0 | 0.60±0.10 | 100±1 | 6.2—11 |
| Φ13 | 13.5±0.5 | 0.35±0.06 | ≤6.5 | 0.70±0.10 | 100±1 | 6.7—12 |
| Φ14 | 14.5±0.5 | 0.35±0.06 | ≤7.0 | 0.70±0.10 | 100±1 | 7.3—13 |
| Φ15 | 15.5±0.5 | 0.40±0.08 | ≤7.5 | 0.75±0.10 | 100±1 | 7.8—14 |
| Φ16 | 16.5±0.5 | 0.40±0.08 | ≤8.0 | 0.75±0.10 | 100±1 | 8.3—15 |
| Φ17 | 17.5±0.5 | 0.40±0.08 | ≤8.5 | 0.75±0.10 | 100±1 | 8.8—16 |
| Φ18 | 19.0±0.7 | 0.40±0.08 | ≤9.0 | 0.75±0.10 | 100±1 | 9.3—17 |
| Φ20 | 21.0±0.7 | 0.40±0.08 | ≤10.0 | 0.75±0.10 | 100±1 | 10.4—19 |
| Φ22 | 23.0±0.7 | 0.40±0.08 | ≤11.0 | 0.80±0.10 | 100±1 | 11.4—21 |
| Φ25 | 26.0±0.7 | 0.50±0.10 | ≤12.5 | 0.90±0.10 | 50±0.5 | 12.8—24 |
| Φ28 | 29.0±0.7 | 0.50±0.10 | ≤14.0 | 0.90±0.10 | 50±0.5 | 14.4—29 |
| Φ30 | 31.0±0.7 | 0.50±0.10 | ≤15.0 | 0.95±0.10 | 50±0.5 | 16—29 |
| Φ35 | 36.0±0.7 | 0.50±0.10 | ≤17.5 | 1.00±0.12 | 50±0.5 | 18—34 |
| Φ40 | 41.0±0.7 | 0.55±0.10 | ≤20.0 | 1.00±0.12 | 50±0.5 | 21—39 |
| Φ45 | 46.0±0.7 | 0.55±0.10 | ≤22.5 | 1.00±0.12 | 25±0.5 | 23—44 |
| Φ50 | 51.0±0.7 | 0.55±0.10 | ≤25.0 | 1.00±0.12 | 25±0.5 | 26—49 |
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Frequently Asked Questions
The standard shrinkage ratio is 2:1, meaning the inner diameter reduces by half after heating. To choose the right size, measure the maximum outer diameter of the object to be protected, then select a tube with a pre-shrink inner diameter 20%–30% larger than that measurement. Confirm the final post-shrink inner diameter will snugly fit the object.
Standard models are rated for continuous use from -55°C to +125°C, making them suitable for most indoor and outdoor environments. High-temperature enhanced models can withstand up to +135°C or +150°C, ideal for demanding applications such as engine compartments or industrial heating zones.
Yes. Our mainstream products comply with EU directives including RoHS and REACH, ensuring they are free of hazardous substances such as lead, cadmium, and mercury. They are also certified to international safety standards including UL and CSA, meeting global export requirements.
Single-wall tubing provides standard insulation, bundling, and mechanical protection. Dual-wall adhesive-lined tubing has an inner layer of hot-melt adhesive that melts during shrinkage, creating a waterproof, moisture-resistant, and sealed bond around the protected object. Dual-wall types are highly recommended for outdoor, marine, and humid environments.
A heat gun is the most recommended tool for even, controlled heating. Ovens and propane torches may also be used. Slide the tubing over the object, then apply heat evenly from the center outward or from one end to the other. Avoid holding heat in one spot for too long. The process is complete when the tubing is fully contracted, smooth, and tightly conforms to the surface without bubbles or wrinkles.
Our PE heat shrink tubing can achieve UL VW-1 or higher flame retardancy ratings through the addition of flame retardants. The material is self-extinguishing, meaning it will stop burning once the flame source is removed. It carries a standard voltage rating of up to 600V and passes a 2500V dielectric voltage withstand test, making it fully safe and reliable for most low to medium voltage electrical applications.