This 3/8″ ID 3:1 dual wall adhesive-lined heat shrink tubing is designed for professional-grade sealing, insulation, and environmental protection of heavy-gauge wire connections. Each pack includes (8) 12″ black and (8) 12″ red pieces, allowing for quick identification in automotive, marine, and industrial systems. The inner thermoplastic adhesive melts when heated, forming a durable bond that resists moisture, corrosion, and mechanical stress.

Specifications & Features

• Shrink Ratio: 3:1
• Pre-shrink Inner Diameter: 3/8″
• Recovered Inner Diameter: 0.125″
• Wall Type: Dual wall with internal adhesive lining
• Adhesive Type: Heat-activated modified polyimide glue
• Includes: (8) Black 12″ pieces and (8) Red 12″ pieces
• Creates a watertight seal to protect splices from corrosion and contaminants
• Highly flexible construction conforms to irregular shapes and tight areas
• Ideal for marine wire splices, automotive harnesses, and outdoor electronic connections