1/2″ ID Heat Shrink Tubing 3:1 Ratio Dual Wall Adhesive 12″ Length 4 or 12 Pack

This 1/2″ ID 3:1 dual wall adhesive-lined heat shrink tubing is designed for 8–4 AWG wire insulation and environmental sealing. Its flexible polyolefin outer layer and internal thermoplastic adhesive form a tight, weather-resistant seal when heated, making it ideal for protecting splices, breakouts, and terminals in harsh automotive and marine environments.

Specifications & Features

• Wire Compatibility: 8–4 AWG
• Shrink Ratio: 3:1
• Pre-shrink Inner Diameter: 1/2″
• Recovered Inner Diameter: 0.160″
• Wall Type: Dual wall with internal thermoplastic adhesive lining
• Material: Flame-retardant polyolefin (outer) with adhesive (inner)
• Length: 12″ per piece
• Available Colors: Black, Red, Clear
• Adhesive lining melts when heated to seal out water and contaminants
• Highly flexible tubing conforms to complex wire shapes and junctions
• Recommended for marine wiring, vehicle harnesses, and electronic repairs