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This marine-grade heat shrink wire tubing creates a waterproof and air-tight seal around electrical connections, preventing water damage. With a high 3:1 shrink ratio, it offers a tight grip on wires and provides thermal insulation for heat-sensitive components, eliminating the shrinkage issues common in 2:1 tubing. The dual-walled, adhesive-lined tubing melts when heated and seals the connections as it cools, ensuring a firm and secure bond. Made from flame-retardant material, it’s flexible, high in tensile strength, and designed to make the electrical connection more durable than the wire itself, providing long-lasting protection and reliability.