Import Dual Wall Adhesive-Line Heat-Shrink — Buy in Bulk from Supplier in China

Dual wall adhesive-line heat-shrink tubing from Dongguan Front Insulation Materials Co. Ltd. is a polyolefin-based product with an internal adhesive layer designed to create a sealed, protective barrier around wire splices and connectors. The tubing shrinks to 50% of its original diameter when heated, with a shrink ratio of 2:1. Wall thickness is 1.2 mm before shrinking and 0.6 mm after, providing mechanical protection and environmental sealing. The adhesive layer activates at 100°C and forms a waterproof, dustproof bond on copper, aluminum, and insulated conductors.

This product is manufactured from cross-linked polyolefin with a thermoplastic adhesive lining, conforming to standard industry material requirements for electrical insulation. The adhesive is ethylene-vinyl acetate based, compatible with most wire insulation types including PVC, XLPE, and rubber. Typical operating temperature range is -55°C to 125°C, with short-term exposure tolerance up to 135°C. The tubing is rated for UL 224 Class 125 and meets RoHS 2.0 directives for restricted substances. Common variants include clear, black, and colored options for identification, with no UV stabilizers added unless specified.

This heat-shrink tubing is primarily used in automotive wiring harnesses, marine electrical systems, aerospace avionics, and industrial control panels where moisture resistance and vibration damping are critical. Buyers include OEMs, Tier 2 automotive suppliers, and marine equipment manufacturers sourcing bulk for production lines. Packaging is typically 100 meters per reel, with inner cartons of 5 reels. Minimum order quantities are negotiable but typically start at 500 meters per size. Lead times are 15 to 20 days after order confirmation, with FOB Shenzhen or CIF terms available.

Dongguan Front Insulation Materials Co. Ltd. is a manufacturer based in Qingxi Town, Dongguan, Guangdong Province, specializing in electrical insulation products including heat-shrink tubing and sleeving. The company operates from a 6,000 square meter facility in Chun Yuan Industrial Zone and holds no public certifications listed in this sourcing profile. Response rate and average response time are not tracked by the platform, indicating limited engagement on digital inquiry channels. The supplier does not claim export history, client names, or years in operation.

This supplier focuses on producing polyolefin-based thermal shrink products for industrial and automotive applications. The listing does not indicate in-house testing labs, ISO certification, or third-party quality audits. Production capacity and workforce size are not disclosed. Buyers should treat this as a direct manufacturer without verified quality management systems unless independently confirmed. No claims are made regarding environmental compliance beyond RoHS alignment, and no sustainability initiatives are referenced.