This 3/4″ ID 3:1 dual wall adhesive-lined heat shrink tubing provides durable environmental sealing and high-performance insulation for 42/0 AWG wire. When heated, the thermoplastic adhesive lining melts to create a watertight, corrosion-resistant sealideal for marine, automotive, and heavy-duty electrical applications where protection against moisture and abrasion is critical.

Specifications & Features

• Wire Compatibility: 42/0 AWG
• Shrink Ratio: 3:1
• Pre-shrink Inner Diameter: 3/4″
• Recovered Inner Diameter: 0.250″
• Wall Type: Dual wall with internal thermoplastic adhesive lining
• Material: Flame-retardant polyolefin outer layer
• Length: 12″ per segment
• Available Colors: Black, Red, Clear
• Forms a secure barrier against water, oil, and contaminants for extended service life
• Highly flexible tubing conforms to irregular shapes without splitting
• Used in automotive wire harnesses, marine battery leads, and heavy-gauge splices