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

Ancor Adhesive Lined Heat Shrink Tubing (ALT) in 1/8" x 48" black is the marine electrician's go-to solution for sealing and protecting electrical connections on boats, fishing vessels, and saltwater equipment. After years on the water, any experienced boater knows that exposed wire connections are an invitation for corrosion, water intrusion, and electrical failure—especially in harsh marine environments. This adhesive-lined heat shrink tubing eliminates those vulnerabilities by providing a waterproof, durable seal that holds up to spray, humidity, and the relentless UV exposure of the open water.

The tubing features cross-linked polyolefin construction, which delivers superior strength and flexibility compared to standard heat shrink—critical when vibration from engines and rough seas would otherwise crack brittle insulation. Rated for wire sizes under 18 AWG, this 48-inch length shrinks from 1/8" diameter down to 1/32" when heated, creating a tight, adhesive-bonded seal around splice points, terminal connections, and wire bundles. The built-in adhesive lining melts when heated, flowing into gaps and crevices to form an airtight barrier that blocks moisture at the molecular level—not just at the surface. Simply cut to length, slide over your connection, and apply heat with a heat gun or lighter until the tubing contracts and the adhesive flows; the result is a professional-grade waterproof joint that won't unravel or separate.

Whether you're rewiring a transom trolling motor, splicing gauge lines, repairing deck light circuits, or sealing bilge pump connections, this tubing is indispensable in any boat's electrical repair kit. Anglers and charter captains rely on Ancor heat shrink for everything from sonar transducer connections to battery cable terminations—applications where a single failed joint can strand you miles from the dock. One 48-inch pack provides multiple repairs, and the black color blends seamlessly with marine-grade wiring. For permanent, salt-water-resistant electrical protection that outlasts your boat's season, Ancor Adhesive Lined Heat Shrink Tubing delivers the reliability professionals demand.