Cable Sealing with 3M Scotchcast Resin

Published 14 Feb 2025

Cable Sealing with 3M Scotchcast Resin

3M Electrical Liquid Resin 2123 

3M Scotchcast Resin 2123 is a two-part, unfilled polybutadiene resin designed for temperature curing – the resin from 3M Electrical offers the following features, consistent across the full range of 3M Scotchcast Electrical Liquid Resins: this re-enterable resin is ideal for low voltage cable sealing and insulation in electrical boxes. It comes with the Easy Dispenser 250, ensuring a cleaner application with reduced waste.

The 2123 Resin is formulated for virtually every electrical application requiring a soft, re-enterable resin with good handling and performance characteristics up to 1000 Volts.

Contact us for 3M Electrical technical support, specification guidance or assistance on the selection of electrical insulating resins for all LV MV HV applications.

3M 2123

Scotchcast Electrical Liquid Resins

Typical Property Data – Room Cures

• Polymer Cure/Cured Form/ Filler/Colour – Polybutadiene Room-Temperature Soft, re-enterable Unfilled Translucent Amber
• Temperature Class – 0
• 3M Electrical Liquid Resin Product Number – 2123
• Mixing Ratio – Wt 1:1 Vol (%) 48:52
• Viscosity at 23°C (73°F) (Centipoise) – A = 350-750* B = 700-1400*
• Cure Schedules (Temp/Time) – 21°C (70°F) 24 hrs.
• Gel Time – 62 min

3M Scotchcast Re-Enterable Electrical Insulating Resin 2123 is a soft, two-part polybutadiene resin designed for cable splice protection. It offers excellent handling and performance features and is formulated to be re-enterable for splice sealing. This versatile resin bonds effectively to most cable jackets while providing moisture sealing.

The resin is characterised by good wetting properties and low viscosity, ensuring ease of application. It cures at room temperature and functions as an insulating material for cable splices up to 1 kV. Its flexible, soft nature allows it to flow smoothly, even at low temperatures, filling enclosures and reducing voids. It is tested in accordance with CENELEC HD 623.S1 (EN50393) standards and complies with 2011/65/EU (RoHS) and 1907/2007/EC (REACH) regulations.

3M Scotchcast Resin Features

• Re-accessibility of the cable connection
• Homogeneous and reliable insulation
• Good adhesion of the resin on cables and on itself
• Excellent protection against water
• Low exothermic reaction temperature (0,6 K raise from 24° C)
• Continuous operating temperature of the resin at 90° C, emergencies up to 130° C

3M DISTRIBUTORS, STOCKISTS & SUPPLIERS

Thorne & Derrick provide competitive prices and fast delivery from stock for the complete range of 3M Scotchcast and Cold Shrink cable joints, terminations, resins and Scotch electrical tapes – we stock high voltage cable joints and terminations manufactured from 3M using Cold Shrink for 11kV and 33kV cables.