Import Adhesive-Lined Heat Shrink Tube — Buy in wholesale FOB from Supplier in China

Shenzhen Sunbow Insulation Materials Mfg. Co., Ltd manufactures adhesive-lined heat shrink tubes from cross-linked polyolefin with an inner layer of environmental friendly hot-melt adhesive. The operating temperature range spans -45°C to 125°C, with shrink initiation between 70°C and 125°C. Shrink ratios of 2:1, 3:1, and 4:1 are offered, with two optional wall thickness configurations. The product carries UL, RoHS, and REACH certifications and is rated for 600V applications. Construction combines the mechanical protection of radiation-crosslinked polyethylene or polyolefin with the environmental sealing of a thermoplastic adhesive that flows upon heating to fill voids and bond to substrates.

The cross-linked polyolefin outer layer provides abrasion resistance, chemical stability, and dielectric strength typical of this insulation class. The hot-melt adhesive inner lining, activated during the shrinking process, creates a moisture-resistant seal and mechanical bond to the underlying cable or connector. Two wall thickness options suggest standard and heavy-duty variants for different mechanical protection requirements. The 600V rating positions this product for low-to-medium voltage electrical applications. Working temperature extremes of -45°C to 125°C indicate suitability for both cold-climate installations and thermally stressed environments such as engine compartments or industrial machinery.

Primary buyers operate in electrical and electronics manufacturing, telecommunications infrastructure, automotive wiring harness production, marine electrical systems, and aerospace cable protection. The adhesive lining makes these tubes particularly suitable for applications requiring waterproofing and strain relief, such as outdoor cable joints, battery terminal covers, and connector backshell sealing. Importers should verify the specific UL file number, the exact polyolefin base resin, and the adhesive composition for compatibility with their application temperature cycles and chemical exposure profiles. Shrink ratio selection depends on the range between recovered and expanded diameters needed for their cable bundle sizes.

Shenzhen Sunbow Insulation Materials Mfg. Co., Ltd is located at No 8, 2nd Industrial Zone, Xiacun Community, Gongming Town, Guangming, Shenzhen 518106, Guangdong Province, China. The company holds harbor trust tier status on the sourcing platform, with a response rate currently showing 0.00 and no recorded average response hours. This pattern suggests limited platform engagement rather than operational deficiency, common among established manufacturers with direct customer channels. The Gongming Town location places the company within Shenzhen's northern industrial corridor, with access to Guangdong's dense supplier network for polymers, additives, and packaging materials.

The manufacturer's product focus centres on insulation materials for electrical and electronics sectors, with this adhesive-lined heat shrink tube representing a core offering. No establishment year, production floor area, employee count, or revenue figures are stated in the source profile. The company claims UL, RoHS, and REACH certifications without specifying certifying bodies or scope limits. Buyers should request the UL file number to verify listing status, confirm the RoHS test report date and testing laboratory, and obtain the REACH SVHC disclosure for the specific product SKU. Whether the company operates its own extrusion and irradiation cross-linking facilities, or sources cross-linked tubing for adhesive coating, is not disclosed and should be clarified.