Marine Grade Electrical Heat Shrink Butt Connectors (22-18G)

These Marine Grade Heat Shrink Butt Connectors (22–18 AWG) from Ancor are trusted for professional marine, trailer, and automotive use. Designed for harsh environments, they feature a heat-activated adhesive lining that shrinks to form a watertight seal, offering unmatched protection against moisture, vibration, and corrosion — ideal for saltwater conditions or heavy-duty off-road use.

Each connector is constructed from tinned pure copper for optimal conductivity and corrosion resistance, ensuring your wiring remains secure and efficient over time. The heat shrink tubing enhances insulation and provides strain relief, reducing wire fatigue in mobile or vibration-prone setups.

Perfect for marine electrical repairs, trailer lighting installations, and general outdoor electrical applications, these connectors are UL listed and CSA recognized, offering peace of mind for both professionals and DIYers.

Explore more marine accessories for quality components built for marine conditions. You can also check out this helpful blog from on safe marine wiring practices to understand why waterproof connectors matter so much in harsh environments.

Whether you’re installing a bilge pump or wiring your trailer lights, these Marine Grade Heat Shrink Butt Connectors deliver the performance and protection you need — every time.

Key Features:

• Wire Size Compatibility: 22–18 AWG

• Construction: Tinned copper with adhesive-lined heat shrink tubing

• Protection: Fully waterproof and corrosion-resistant

• Use Case: Ideal for low-voltage marine electronics, lighting, pumps, and trailers

• Installation: Easy crimp-and-heat process for a permanent seal