How Does Heat Shrink Tubing Work?

Heat shrink tubing expands when made. It shrinks back when heated. This creates a tight seal. The process is simple but effective.

Polymer materials make it work. They remember original size. Heat activates this memory. The tubing contracts uniformly.

Standard Shrinking Temperatures

Most types shrink at 90°C. PVC versions need less heat. Polyolefin requires 125°C.

High-temp grades need 150°C+. Always check product specs. Wrong heat causes failure.

Temperature Guide by Material

• PVC: 90-120°C
• Polyolefin: 125-135°C
• Fluoropolymer: 175-200°C
• Silicone: 160-180°C

Match temperature to application. Consider environment factors too.

Proper Heating Methods

Use heat guns carefully. Keep 2-3 inches away. Move constantly in circles.

Avoid direct flames. They damage materials. Even heating works best.

Common Mistakes to Avoid

1. Overheating one spot

2. Not heating enough

3. Wrong temperature choice

4. Rushing the process

Industrial Applications

Automotive wiring uses 125°C. Aerospace needs 175°C+. Electronics require 90°C.

Each use has special needs. Select tubing accordingly.

Correct temperatures matter most. Follow guidelines exactly. Get perfect results every time.