1/8″ ID Heat Shrink Tubing 3:1 Ratio Dual Wall Adhesive 12″ Length 4 or 16 Pack

This 1/8″ ID 3:1 dual wall heat shrink tubing is engineered for 30–18 AWG wire insulation and sealing in automotive, marine, and industrial environments. Its flexible polyolefin outer layer and internal thermoplastic adhesive lining deliver a secure, watertight bond when heated—ideal for splices, terminals, and harness repairs exposed to moisture or vibration.

Specifications & Features

• Wire Compatibility: 30–18 AWG
• Shrink Ratio: 3:1
• Pre-shrink Inner Diameter: 1/8″
• Recovered Inner Diameter: 0.040″
• Wall Type: Dual wall with heat-activated adhesive lining
• Material: Flame-retardant polyolefin with thermoplastic adhesive
• Available Colors: Black, Red, Clear
• Flexible design conforms to irregular wire shapes and splices
• Creates a watertight, corrosion-resistant seal around exposed wiring
• Used in automotive harnesses, marine wiring, and electronics repair