Ancor Heat Shrink Tubing 1" x 3" - Black & Red Combo

Ancor Heat Shrink Tubing 1" x 3" in Black and Red Combo is a marine-grade electrical protection solution designed for anyone who runs 12V systems on the water. Whether you're upgrading navigation lights, securing battery terminals, or reinforcing splice connections in your boat's wiring harness, this heat shrink tubing delivers the insulation and weatherproofing that saltwater and freshwater environments demand.

Built by Ancor—the brand trusted by professional boat builders and serious anglers—this combo pack gives you two color options to organize and identify different circuits at a glance. The 1-inch diameter tubing shrinks to form a tight, moisture-resistant seal around connectors, terminals, and wire bundles when heated. Ancor's polyolefin formulation resists UV damage, salt spray, and vibration—three enemies of typical electrical tape on a moving boat.

The 3-inch length per piece offers enough coverage for standard battery post wraps, terminal boots, and splice reinforcement without excess waste. Black and red options allow color-coded circuit identification, making future troubleshooting or upgrades faster and safer. Simply slip the tubing over your connection, apply heat with a heat gun or lighter, and the material contracts to create a permanent, professional seal that won't unravel or slip under engine vibration or wave action.