UNDERGROUND® wire connectors are designed to secure and protect wire connections in a wide variety of below grade, wet location and direct burial applications. Quick and easy application saves time and energy, eliminating the need for heat shrink, resin packs and multi-step corrosion kits. With an expanding, live action spring and pre-filled with a silicone based sealant, UNDERGROUND® wire connectors make fast, secure and long-lasting connections. The tough, thermoplastic shell provides extra protection against accidental impacts and the deep skirt provides superior moisture resistance, making these connectors UL listed to 486D for use in damp, wet or direct burial, below grade applications.