Ancor Adhesive Lined Heat Shrink Tubing (ALT) - 3/8" x 48" - 1-Pack - Black

The Ancor Adhesive Lined Heat Shrink Tubing (ALT) in 3/8" x 48" Black is purpose-built for marine electrical repairs and connections where moisture, corrosion, and vibration demand absolute reliability. After years on the water, any experienced angler or boater knows that saltwater and freshwater environments relentlessly attack exposed wire connections—this tubing seals, insulates, and protects in one simple application. Whether you're running new wiring through a center console, repairing corroded connections below deck, or bundling and protecting multi-wire harnesses, this heat shrink tubing is the standard marine electricians reach for.

Cross-linked polyolefin construction delivers superior strength and flexibility compared to standard heat shrink, resisting UV degradation and temperature extremes encountered in marine environments. The adhesive-lined interior melts when heated, flowing into wire strands and crevices to create a waterproof seal that blocks moisture infiltration at the molecular level—critical for preventing corrosion in the harsh saltwater or humid freshwater conditions. Sized for 12–8 AWG wire, it shrinks from 3/8" down to 1/8" diameter, accommodating various bundle sizes while maintaining a snug, permanent fit that won't slip or separate under engine vibration or rough seas.

Boaters tackling bilge pump rewires, trolling motor connections, battery bank upgrades, or any subsystem requiring voltage and moisture protection will appreciate the 48-inch length—enough for multiple repairs or full-harness coverage without excess waste. Simply slide the tubing over the connection, apply heat with a marine-grade heat gun, and watch the adhesive seal bond permanently. This single-pack format makes it ideal for targeted repairs or as part of a well-stocked marine electrical kit, ensuring your boat's wiring stays dry, safe, and corrosion-free for seasons to come.