Ancor Adhesive Lined Heat Shrink Tubing (ALT) - 3/4" x 3" - 3-Pack - Black

The Ancor Adhesive Lined Heat Shrink Tubing (ALT) in 3/4" x 3" format (3-pack, black) is an essential marine electrical repair and protection solution for anglers and boaters who demand reliability on the water. This tubing is ideal for splicing battery cables, waterproofing wire connections in tight engine compartments, and reinforcing terminal connections exposed to salt spray and moisture.

Built to withstand the corrosive marine environment, adhesive-lined heat shrink has become the standard for professional boat wiring and electrical maintenance across commercial and recreational vessels alike. The built-in adhesive layer activates when heated, creating a permanent waterproof seal around connections without requiring solder or additional adhesives. The 3/4" diameter and 3-inch length provide ample coverage for larger terminal connections or multiple wraps on critical joints.

Experienced boat owners and marine electricians choose Ancor heat shrink tubing for its reliability and performance in demanding environments. When heated with a heat gun or lighter, the tubing shrinks tightly around the conductor while the interior adhesive melts and flows, blocking moisture, salt, and corrosive elements from reaching bare copper—the primary failure point in marine electrical systems. The black color resists UV degradation and blends seamlessly with most boat wiring harnesses.