3M™ Cold Shrink Silicone Rubber Connector Insulators 8440 Series are designed for electrical insulation and sealing of connectors and lugs. These sleeves are factory expanded and assembled on a removable core, allowing for a tight, reliable seal upon installation. They offer excellent resistance to moisture, chemicals, ozone, UV light, and extreme temperatures, making them suitable for both indoor and outdoor applications in cable tray or overhead environments. They are commonly used for primary electrical insulation on wire and cable splices, aircraft cables, and for sheath repairs.