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Radiation Cross-linked Polyethylene Pressure Sensitive Heat Shrinkable Tape

Product Highlights

Model: JY-306

  • Pressure-Sensitive Adhesive — no separate primer or heat activation for adhesion
  • Radiation Cross-Linked Backing — high mechanical strength and durability
  • Self-Adhesive — modified polyisobutylene adhesive provides instant bonding
  • Versatile Application — suitable for water-logged areas, tunnels, and corrosive environments
  • Outer Wrap Compatible — ideal as protective wrap for visco-elastic systems
  • Customizable — sizes available upon request

Product Description

Radiation Cross-Linked Polyethylene Pressure-Sensitive Adhesive Heat Shrinkable Tape is manufactured by coating a modified polyisobutylene (PIB) pressure-sensitive adhesive onto a radiation cross-linked polyethylene backing. When heated, the tape shrinks tightly around the pipe, forming a complete anti-corrosion system. The pressure-sensitive adhesive provides instant bonding without the need for separate primer or heat activation for adhesion — simply apply and heat to shrink.

The radiation cross-linked backing offers high mechanical strength, excellent durability, and resistance to corrosion, aging, and environmental stress cracking. The modified PIB adhesive remains permanently flexible, providing long-term sealing performance.

  • Field joint coating in water-logged areas and swampy terrain
  • Pipeline corrosion protection in mountain tunnels and underwater tunnels
  • External coating repair for pipelines in highly corrosive environments
  • As an outer protective wrap for visco-elastic systems
  • In-service pipeline repair and rehabilitation
  • Field joint coating where primer application is difficult or undesirable

System Composition

The pressure-sensitive adhesive heat shrinkable tape can be used as a standalone anti-corrosion system or as a protective outer wrap.

  • Standalone use: Applied directly to the prepared steel surface. No primer is required — the pressure-sensitive adhesive bonds instantly upon contact and heat shrinking.
  • As an outer protective wrap for visco-elastic systems: Applied over visco-elastic tape to provide additional mechanical protection and UV shielding for exposed valves, flanges, and fittings.

Performance Index

Tensile Strength (MPa)≥17
Nominal Fracture Strain (%)≥400
Volume Resistivity (Ω·m)≥1×10¹³
Peel Strength to Steel (23°C) (N/cm)≥50
Peel Strength to PE (23°C) (N/cm)≥50 (cohesive failure)
Holding Power (h)≥24
Operating Temperature Range (°C)-45 to +95
Shrinkage Ratio (Circumferential) (%)≥15

Installation Guide & Precautions

Installation Methods

The pressure-sensitive adhesive heat shrinkable tape is applied using a propane torch or heat gun. Unlike standard heat shrinkable tapes, this tape requires no separate primer — the pressure-sensitive adhesive bonds instantly upon contact and heat shrinking.

Quick Installation Steps (Standalone Use)

  1. Surface preparation: Clean and blast the weld area to Sa2.5 (or St3 if blasting is not feasible). Remove all moisture, oil, and contaminants.
  2. Pipe preheating: Preheat the pipe around the weld to remove surface moisture. Excessive preheating is not required.
  3. Position the tape: Wrap the tape around the prepared weld area with a minimum 100mm overlap at the lap joint. The pressure-sensitive adhesive will bond on contact.
  4. Install fixing strip: Secure the overlap seam with the provided fixing strip or by spot-heating the tape edge.
  5. Heat shrinking: Using a propane torch, heat the tape evenly from the center outward. Shrink the tape until the adhesive flows out slightly at both ends, ensuring a complete seal.
  6. Final inspection: Check for smooth coverage, no bubbles, wrinkles, or lifted edges.

Quick Installation Steps (As Outer Wrap for Visco-Elastic Tape)

  1. Apply visco-elastic tape to the flange, valve, or irregular surface following standard procedures.
  2. Immediately wrap the pressure-sensitive adhesive heat shrinkable tape over the visco-elastic tape with 55% minimum overlap.
  3. Heat the tape evenly to shrink and bond it to the visco-elastic tape layer.
  4. Press the tape ends firmly to prevent lifting.

Key Reminders

  • No primer needed — the pressure-sensitive adhesive eliminates the need for primer application, simplifying installation.
  • Do not overheat — excessive heat can burn the backing or degrade the adhesive. Keep the torch moving at all times.
  • Shrink from the center — this prevents air entrapment and ensures a smooth finish.
  • Overlap is critical — a minimum 100mm overlap is essential for sealing integrity.
  • Ideal for wet or humid conditions — the pressure-sensitive adhesive performs well in environments where primer application is difficult.
  • Storage: Keep in original packaging in a dry, cool area below 35°C, away from direct sunlight and heat sources.

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