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| Customization: | Available |
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| Application: | Automotive Harnessing, Communication industry, Machine Protection, Wire & Cable Protection |
| Color: | Black |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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| Property | Requirement | Test method |
| Longitudinal charge | -15+0% | ASTM D 2671 |
| Tensile strength | ≥9.0 MPa | ASTM D 2671 |
| Ultimate Elongation | ≥200% | ASTM D 2671 |
| Heat shock 225C/4h |
No cracking, dripping, or flowing of outer wall | ASTM D 2671 |
| Heating Aging, 150C/168h | No cracking, dripping, or flowing of outer wall | ASTM D 2671 |
| Ultimate Elongation after heat aging |
≥100% | ASTM D 2671 |
| Low-Temp.Impact 4H±15min at -55+2ºC |
No crack | ASTM D 2671 |
| Volume resistivity | ≥1*1012 Ω•cm | ASTM D 257 |
| Dielectric strength | ≥19.7 KV/mm | ASTM D 2671 |
| Flammability | Self-extinguishing ≤60s | ASTM D 2671 |
Size |
Inner diameter | Wall thickness | ||
| IDe(min) Expanded as supplied | IDr(max) Recovered after heating | Tw(nom) Recovered after heating |
Ta(nom) Recovered after heating |
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| Φ3/1 | 3 | 1 | 1 | 0.5 |
| Φ6/2 | 6 | 2 | 1 | 0.5 |
| Φ9/3 | 9 | 3 | 1.4 | 0.6 |
| Φ12/4 | 12 | 4 | 1.78 | 0.75 |
| Φ16/4 | 16 | 4 | 1.78 | 0.75 |
| Φ24/6 | 24 | 6 | 2.25 | 0.8 |
| Φ32/8 | 32 | 8 | 2.54 | 1.0 |
| Φ52/13 | 52 | 13 | 2.54 | 1.0 |


Shanghai Wellco International Limited is a professional team with 18 years of experience in R&D, production, and sales of special heat shrink tubes and other radiation crosslinking materials. We specialize in providing a wide range of products and solutions for insulation, connection, waterproofing, high temperature resistance, chemical resistance, EMI protection, and mechanical protection for wires and cables.
With a strong technical force and advanced production equipment, we offer heat shrink tubes and insulation tubes made from various materials such as modified PE, PVDF, FEP, EPDM, Silicone, FKM, FEP, PTFE, and more. Our products find extensive applications in electronic communication, automobile, high-speed rail, electric motor, aviation, medical, and other industries, providing insulation, water-proofing, electrostatic shielding, oil resistance, chemical resistance, and high-temperature protection.
All our products have passed UL certification, RoHS, and REACH compliance, ensuring their quality and safety.
We also offer customization and development of products with special requirements, adhering to ISO9001 and IATF16949 quality management system standards to guarantee the stability and reliability of our product quality.
Shanghai Wellco International Limited is a professional manufacturer of special heat shrink tubes and other radiation crosslinking insulation materials. With over 20 years of experience in insulation, we are based in Shanghai, China and have been serving customers since 2017. Our office consists of a dedicated team of 5-10 people.
We prioritize quality and ensure it through the following measures:
Our product range includes:
There are several reasons why you should choose us over other suppliers:
We offer the following services: