TITLE：How to Choose the Right Heat Shrink Tube for Reliable Cable Protection
Choosing a good heat shrink tube is not just about shrink ratio or price—it’s about ensuring long-term cable performance, safe operation, and ease of use in real working conditions. Whether you are a project contractor, switchgear OEM, or field technician, selecting the right tubing directly affects the reliability of your electrical systems.
1、Shrink Ratio and Fit
The most common shrink ratios are 2:1, 3:1, and 4:1. A good heat shrink tube should shrink tightly around cables or terminals without leaving air gaps or risking over-compression.
2、Material Quality
Look for cross-linked polyolefin or dual-wall types with adhesive lining. These materials ensure:
Better flame retardancy
High dielectric strength
Water and oil resistance after shrinking
3、Ease of Installation
A quality tube should shrink evenly without burning, even when applied with basic heat guns. It must adapt to irregular shapes without cracking or sliding.
4、Environmental Durability
If used in outdoor or high-humidity areas, choose tubes with:
UV resistance
Wide temperature tolerance
Anti-aging compounds for long-term exposure
Not all heat shrink tubes are created equal. Consider these when choosing:
·For indoor LV control panels: standard 2:1 black tubes are sufficient
·For outdoor power cables: use dual-wall tubes with sealing adhesive
·For MV cable terminations or joints: choose thicker, flame-retardant tubing rated for higher voltages
·For field kits or emergency repairs: look for pre-cut, color-coded tubing for fast deployment
Why More Buyers Choose PUTAI Electric Heat Shrink Tubes
PUTAI Electric offers a complete line of heat shrink tubing optimized for power equipment manufacturing and service maintenance:
·Accurate shrink ratio and wall thickness
·RoHS-compliant materials
·Pre-packaged kits for 10–35kV cable accessories
·Custom cutting and private label options available
From OEMs to utility contractors, customers trust PUTAI’s tubing for stable quality, fast delivery, and easy application across a wide range of environments.
