Heat shrinkage ratio: 4:1, starting shrinkage temperature: ≥ 70 ℃, final shrinkage temperature: ≥ 125 ℃, service temperature:-45 ℃ ~ 125 ℃ The main function is to seal waterproof, anti-corrosion, anti-leakage, and multi-strand wire harnesses, mainly used in all kinds of wire harnesses, marine wire, and cable and metal pipe need to seal waterproof, moisture-proof, and anti-corrosion occasions of sealed insulation, bundling, and other fields.