These heat shrink butt splices from Uriah Products are lined with adhesive that helps create a permanent seal that's weatherproof and waterproof. They're also translucent, which allows you to visually inspect the connection. Designed for 12-volt DC systems, these splices accommodate 22- to 18-gauge wires. | Uriah 22-18 AWG Butt Splices 10 Pack in Red