Description

What Is a Raychem Heat Shrink Sleeve?

A heat shrink sleeve (or heat shrink tubing/sleeve) from Raychem (a brand now part of TE Connectivity) is a polymer-based protective tube that shrinks tightly when heated. It’s used in electrical and cable work to:

• Insulate wires and cables
• Seal joints and repairs
• Protect against moisture, abrasion, and corrosion
• Provide mechanical strain relief

After heating (e.g., with a heat gun), the tubing contracts around the object for a snug, durable fit.

Different Raychem products include:

• Wrap-around sleeves that clip or zip on before shrinking (easy repair sleeves).
• Standard heat shrink tubing for insulation and protection.
• Adhesive-lined sleeves that melt and seal for waterproof protection.

These sleeves vary in material, wall thickness, shrink ratio (e.g., 2:1 or 4:1), and temperature resistance, depending on the application (automotive, industrial, power cables, aerospace, etc.).

🧠 How It Works (Quick Summary)

Select the right size & type for your cable or joint (consider shrink ratio and temperature rating).

Position the sleeve over the area to insulate or repair.

Apply heat (heat gun, torch) evenly until the sleeve shrinks tightly around the item.

Sealing and protection are achieved as the material contracts and, if adhesive-lined, melts to bond.