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3M Scotchcast™ 251 Rigid Polyurethane Electrical Resin, 20 lb, Brown

ID: 3MR25120LB Mfr ID: 3MR25120LB
Manufactured by: 3M Electrical OEM Materials
3M™ Scotchcast™ Electrical Resin 251 is a medium viscosity, rigid, Class F (155 deg C) resin system widely used where physical strength and excellent properties at elevated temperatures are required.
Special Handling Required



USD $598.04 / KT

Buy more and save

2-3 $540.54 / KT
4-7 $493.12 / KT
8+ $419.52 / KT

6  In Stock

 Future Availability 

This item may be sold in units of 1.

Order Form
  • Brand name :  3M
  • Trade Name :  Scotchcast™
  • Series :  Scotchcast™ 251
  • Item Name :  Polyurethane Electrical Resin
  • Short Desc :  RESIN,EPOXY,3M 251 20-LB KIT BRN
  • UPC :  00054007345169
  • UNSPSC :  13111061

This resin is a two-part, oven-curing, class F, rigid, filled epoxy liquid resin.

Performance Details
Elongation 0.7% at Break 
Flexural Strength 9500  psi
Gel Time 20  min
Moisture Absorption 0.25% Weight Increases 240 hr at 96% R.H 
Tensile Strength 5280  psi
Design & Construction
Color Brown 
Form Liquid 
Cure Type Oven 
General Features
Type Rigid 
Environmental Condition
Temperature Rating 155  deg C
Electrical Properties
Dielectric Strength 425  V/Mil
Chemical Properties
Specific Gravity 1.5 
Viscosity 19000  cP
Mixing Ratio 1:1 (Weight), 50:50 (Volume %) 
Viscosity - Part-A 175000  cP
Viscosity - Part-B 10000  cP
Physical Properties
Hardness 40 Shore D 
Container Size 20  lb
Container Type Kit 

3M Scotchcast™ 251 Rigid Polyurethane Electrical Resin, 20 lb, Brown Specification Sheet 

3M Scotchcast™ 251 Rigid Polyurethane Electrical Resin, 20 lb, Brown Material Safety Data Sheet (MSDS) 

3M Scotchcast™ 251 Rigid Polyurethane Electrical Resin, 20 lb, Brown 

Features :

  • An easy 1:1 mix ratio and good handling characteristics have contributed to the product's popularity
  • Warming this resin to 120 deg C (248 deg F) will lower its viscosity below 200 centipoise for maximum impregnating ability
  • High-temperature
  • Excellent electrical properties
  • Filled epoxy liquid resin
  • 5 x 10^-5 length/unit length/deg C coefficient of linear thermal expansion
  • 17,500 psi compressive strength
  • Gel Time: 23 min at 120 deg C
  • Flash Point: A = 202 deg C, B = 152 deg C
  • Viscosity: 19000 cps at 23 deg C/73 deg F/Mixed)
  • Density: A = 1.53 kg/l, B = 1.48 kg/l
  • Temperature Rating: Class F (<=155 deg C)
  • Thermal Conductivity: 8 x 10^-4 Cal/sec/cm^2/deg C/cm
  • Viscosity - Part-B: 10000 cps at 23 deg C/73 deg F

Applications :