3M Scotchcast Electrical Insulating Resin 2104 Data Sheet August 2019 3M Scotchcast Electrical Insulating Resin 2104 is a hard two-part, polyurethane resin Description encapsulant designed especially for permanent splice protection. Scotchcast 2104 resin is formulated for virtually every electrical application requiring a hard, non-reenterable resin with good handling and performance characteristics. Scotchcast 2104 resin is also used as the insulating material for cable splices operating at 1000 volts or less and is rated for continuous use at 194F (90C) with an overload rating of 266F (130C). It may be stocked to cover all hard resin needs, ending the need for multiple encapsulant inventories. Scotchcast 2104 resin is a two-part polyurethane, and is formulated with excellent wetting properties and low viscosity. Scotchcast 2104 resin flows well, even at low temperatures, filling the enclosure completely and eliminating voids. Resin Features: Bonds to all modern cable jackets Bonds to itself Available in two-part closed mixing pouch for easy mixing and pouring Tough Excellent multi-purpose moisture sealing resin Semi-flexible Room temperature cure Low viscosity Color: Dark Green Agency Approvals For RoHS and REACH information, please visit www.3M.com/regs & Self Certifications Resin Applications Replace or repair the jacket on both single and multi-core power cables Insulate between conductors of multi-core splices operating at 1000 volts or less Seal the crotch or sheath when terminating multi-core cables Potting cable or wire encasements Potting cable fittings & splices Potting printed circuit boards Potting junction boxes Filling back shell connectors Potting for motor repairs 1 of 4 3M Scotchcast Electrical Insulating Resin 2104 Typical Physical Not for specifications. Values are typical, not to be considered minimum or maximum. and Electrical Properties measured at room temperature 73F (23C) unless otherwise stated. Properties Typical Value Physical Properties (Test Method) US units (metric) Color Green Hardness (ASTM D2240) 70 Shore A 3 Density (ASTM D792) 0.596 oz/in (1,03 g/cu.cm.) Tensile Strength (ASTM D412) 444 psi (3.06 MPa) Elongation (ASTM D412) 98% Glass Transition Temperature (ASTM E1356-03) -94F (-70C) Maximum Exotherm, (100g) (ASTM D2471-99) 150F (65C) Gel Time (ASTM D2471-99) 18 minutes Viscosity (cP) 77F (25C) (3M Method TM-173) 1,000 - 2,300 Part A Prepolymer 450 - 750 Part B Polyol Specific Gravity (ASTM D891) 1.04 Part A Prepolymer 1 Part B Polyol Moisture Absorption 0.28% wt. gain in 168 hrs 2 Adhesion to Metals (lb/in ) (3M TM-456) Copper 411.6 Brass 285.1 Steel 558 Aluminum 207.03 2 Adhesion to Cable Jackets (lb/in ) (3M TM-457) Vinyl 10.5 Neoprene 140.8 Nylon >25.5 XLPE 221.5 Electrical Properties (Test Method) Typical Value Dielectric Strength (ASTM D149) 524 V/mil 4.59 pf 73F (23C) Dielectric Constant, 60Hz (ASTM D150) 6.8 pf 194F (90C) 9.1% 73F (23C) Dissipation Factor, 60Hz (ASTM D150) >200% 194F (90C) 2 of 4