This 1/2″ ID 3:1 dual wall adhesive-lined heat shrink tubing is ideal for sealing and protecting heavy-duty wire splices and connections in automotive, marine, and industrial environments. Each pack includes (8) 12″ black pieces and (8) 12″ red pieces, offering clear visual distinction for wiring tasks. When heated, the internal adhesive melts to form a tight, waterproof bond that defends against corrosion and contaminants.

Specifications & Features

• Shrink Ratio: 3:1
• Pre-shrink Inner Diameter: 1/2″
• Recovered Inner Diameter: 0.165″
• Wall Type: Dual wall with heat-activated adhesive lining
• Adhesive Type: Modified polyimide thermoplastic glue
• Includes: (8) Black 12″ pieces and (8) Red 12″ pieces
• Forms a watertight, corrosion-resistant seal for outdoor and marine wiring
• Highly flexible for routing around bends, joints, and irregular shapes
• Commonly used for battery cables, harness repairs, and high-amperage terminations