LJR Dual Wall Heat Shrink Tubing
Product Summary
GREMTUBE® G63A dual wall heat shrink tubing combines a flame-retardant polyolefin outer wall with a thermoplastic adhesive inner lining. This advanced construction provides exceptional environmental sealing against water, moisture, and contaminants while offering mechanical protection and strain relief. Available in 3:1 and 4:1 shrink ratios for versatile applications.
Applications
- Cable splice protection
- Wire termination sealing
- Moisture-proof connections
- Corrosion protection
- Strain relief with environmental seal
- Marine and outdoor applications
Available Colours
- Standard: Black
- On Request: Red, Blue, Grey, and others
Size Range
- 3:1 Ratio: 2.4mm to 125mm diameter
- 4:1 Ratio: 4.0mm to 52mm diameter
Key Features
- Dual Wall Construction – Polyolefin outer wall with adhesive inner lining
- Superior Environmental Sealing – Protects against water, moisture, and contaminants
- High Shrink Ratios – 3:1 and 4:1 options for covering various substrate sizes
- Wide Temperature Range – Operating from -45°C to +125°C
- Excellent Adhesion – Strong peel strength to PE (120 N/25mm) and aluminum (80 N/25mm)
- Flame Retardant – Passes ASTM D 2671 B flammability test
- Halogen-Free – Environmentally conscious formulation
Physical Properties
- Outer Material: Cross-linked polyolefin
- Inner Material: Thermoplastic adhesive
- Operating Temperature: -45°C to +125°C
- Shrink Temperature: +125°C
- Longitudinal Change: ±8%
- Tensile Strength (Unaged): ≥ 10.4 MPa
- Elongation at Break: ≥ 200%
Adhesive Properties
- Water Absorption: < 0.2%
- Softening Point: 95°C
- Peel Strength to PE: 120 N/25mm
- Peel Strength to Aluminum: 80 N/25mm
Electrical Properties
- Dielectric Strength: ≥ 15 kV/mm
- Volume Resistivity: ≥ 10¹⁴ Ω.cm
Certifications
- UL 224: VW-1, 600V (AC), 125°C
- UL File: E328344
- RoHS & REACH Compliant
Why choose LJR Heat Shrink Tubing?
- UL Certified Quality: All products carry UL File: E328344 certification
- Extensive Inventory: Wide range of sizes and shrink ratios in stock
- Technical Expertise: Over decades of experience in protective solutions
- Global Standards Compliance: Meet MIL-SPEC, Railway EN 45545-2, and automotive standards
- Fast Delivery: Same-day shipping on in-stock items
How to Choose the Right Heat Shrink Tubing
- Wall Type
- Thin Wall: Choose when flexibility and space-saving are priorities
- Dual Wall: Select for environmental sealing and moisture protection
- Shrink Ratio
- 2:1: Standard protection for uniform diameter applications
- 3:1: Accommodates irregular shapes and connector transitions
- 4:1: Maximum coverage for complex geometries
- Operating Environment
- Temperature range requirements
- Chemical exposure
- UV resistance needs
- Moisture/water exposure
- Size Selection
- Measure the largest diameter to be covered
- Add 20-30% for proper fit
- Consider recovered wall thickness
- Industry Standards
- UL recognition for electrical applications
- MIL-SPEC for aerospace/defense
- Railway EN 45545-2 for transportation
Industries We Serve
Our heat shrink tubing solutions are trusted by professionals in:
- Automotive & Transportation: Wire harness protection, sensor cables
- Industrial Equipment: Motor leads, control wiring
- Marine & Offshore: Corrosion protection, splice sealing
- Rail & Mass Transit: EN 45545-2 compliant solutions
- Telecommunications: Fiber optic protection, cable management
- Renewable Energy: Solar installations, wind turbine applications
Quality Certifications
All LJR Electronics heat shrink products meet or exceed:
- UL 224 Recognition (File: E328344)
- MIL-I-23053/5 military specifications
- RoHS & REACH compliant
- Railway EN 45545-2 fire safety standards
- Halogen-Free formulations available
Need Help Selecting the Right Product?
Our technical team is ready to assist with product selection, custom solutions, and application guidance.
Contact Our Experts:
- Phone: +1 937-388-8551
- Email: ljr.sales@ljrelectronics.com
