3M Cold Shrink Insulator 8428-18, Tape/Wire/UniShield Shielding, 1 kV, Standard

3M Cold Shrink Insulator 8428-18 – Cold Shrink Connector Insulator for Electrical Wire & Cable The 3M Cold Shrink Insulator 8428-18 is a factory-expanded, open-ended tubular rubber sleeve designed for insulation and sealing of inline electrical connectors and splices rated up to 1 kV. It is manufactured from EPDM rubber, providing a durable, moisture-tight seal without the need for mastic or tape. This cold shrink tubing is suitable for copper and aluminum conductors ranging from 450 to 800 kcmil and is commonly used in electrical distribution, wire and cable applications, and lighting solutions. The product supports direct burial and submersible installations, making it ideal for both indoor and outdoor use. The removable core allows for easy installation without tools or heat, ensuring quick and reliable protection for cable splices and connectors. Specifications Manufacturer: 3M Manufacturer Part #: 7000005944 Voltage Rating: 1,000 volts Conductor Size Range: 450–800 kcmil Outer Diameter Range: 0.95" – 1.94" (24.0 – 49.3 mm) Relaxed Tube Length: 18" (457 mm) Material: EPDM Rubber (chloride and sulfur free) Operating Temperature Range: -40°F to 194°F (-40°C to 90°C) Color: Black Product Weight: 0.6750 lbs Country of Origin: United States Made in USA: Yes Features Simple installation requiring no tools or heat Provides a flexible, moisture-tight, water-resistant seal meeting ANSI C119.1 water seal requirements Durable EPDM rubber formulation resists acids, alkalis, ozone, and withstands backfilling Maintains resiliency and pressure after prolonged aging and exposure Suitable for direct burial and submersible applications Compatible with copper and aluminum conductors Extends product life when overwrapped with Scotch® Super 33+™ Vinyl Electrical Tape or Scotch® Self-Fusing Silicone Rubber Electrical Tape 70 in high UV environments Meets electrical insulation requirements for solid dielectric insulated wires and cable splicing Downloads & Links Document Instructions Spec Sheet Document Catalogs Safety Data Sheet