Motors / Stator Epoxy & Potting


EFI Polymers has developed a suite of epoxy encapsulating and potting products specifically for the motor manufacturing industry.  Currently, our material is being used by motor manufacturers all over the world to encapsulate thousands of stators every single day. Our materials for Motors/Coils/Power Supply are formulated with the following properties:

  • Underwriters Laboratories UL 1446 recognition: EFI has numerous systems to select from when customers are looking for a potting compound component of a UL 1446 recognized insulation system for use up to 180C (Class H) UL File # E 210549.
  • Low viscosity: allows our systems to penetrate and release air from even the tightest coil and slot windings, enabling many of our customers to eliminate varnishing and VPI practices from their manufacturing process.
  • Excellent Thermal Regulation: our materials have been formulated to withstand a wide range of temperatures, from Arctic Duty Motors to submersible Motors.
  • Outstanding Thermal Conductivity: our filled epoxy materials excel at transporting and dissipating heat from motors and other coil windings, a reduction in core temperature is always achieved.
  • Process friendly: our materials are designed to have mix ratios, viscosities, gel times that are friendly to process and automate.
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System ID Comments UL Designation Temperature
Class		 Mix Ratio
by Volume		 Mixed Viscosity
Temperature		 Mixed Viscosity
at 77F		 Mixed Density
Lb/Gal		 Mixed Color Gel Time
Mass		 Gel Time Hardness
Shore Type		 Hardness
Value		 Room
Temperature
Cure, Y/N		 Volume Resistivity Insulation Resistivity Surface Resistivity Alternate Mixed
Viscosity
Temperature		 Alternate Mixed
Viscosity		 Alternate Gel
Time Mass		 Alternate Gel
Time Temperature		 Alternate
Gel Time
20290/50013
excellent thermal conductivity and resistance to thermal shock, long work life
11T206-20290/7H013-50013
180
100:21.7
77
2000
13.7
Black
200
300
D
85
Yes
2.8x10E15
200
120
45
20290/50021
excellent thermal conducitivity and resistance to shock
11T206-20290/7H013-50021
180
100:21.7
77
13.7
Black
200
70
D
85
Yes
20271/50013
low shrinkage and exotherm, excellent air release
11T206-20271/7H013-50013
180
100:23.3
77
5000
16.4
Black
200
300
D
85
Yes
3.5x10E15
120
1000
200
120
45
20217/50019
flexible, excellent coil penetration and air release, good thermal shock resistance
100:83.3
77
9000
11
Black
30
120
D
72-60
No
150
20206/50021
excellent coil penetration and thermal shock resistance, moderate work life
11T206-20206/7H013-50021
180
100:27
77
5500
12.2
Black
200
120
D
85
Yes
2.8x10E15
120
1000
200
120
30
20206/50013
excellent coil penetration and thermal shock resistance
11T206-20206/7H013-50013
180
100:27
77
5500
12.2
Black
200
300
D
85
Yes
2.8X10E15
120
1000
200
120
42
20203/50201
most widely used potting material, industry workhorse
11G203-20203/7H015-50201
180
100:100
77
11000
13.5
Black
200
32
D
70
Yes
5.53E+14
2.24E+14
1.57E+16
140
3500
20203/50015
low-cost, general use, easy to mix, excellent air release
11G203-20203/7H015-50015
180
100:50
77
15000
11.7
Black
100
160
D
85
Yes
1.5x10E14
20203/50013
all purpose, general use, long work life.
11G203-20203/7H013-50013
180
100:23.5
77
1200
12.5
Black
400
300
D
75
Yes
1.6c10E14
140
365
20202/50002
color-coded, easy to mix, highly filled
11T202-20202/7H002-50002
180
77
5500
13.0
Blue
100
15
D
90
Yes
1.8x10E14
120
1300
20003/50013
extended work life, transparent, plasticizer free
11T206-20003/7H013-50013
180
100:40
77
600
9.2
Clear
200
360
D
85
Yes
5.0x10E15
120
120
40
120
140
System ID Comments UL Designation Temperature
Class		 Mix Ratio
by Volume		 Mixed Viscosity
Temperature		 Mixed Viscosity
at 77F		 Mixed Density
Lb/Gal
20290/50013
excellent thermal conductivity and resistance to thermal shock, long work life
11T206-20290/7H013-50013
180
100:21.7
77
2000
13.7
20290/50021
excellent thermal conducitivity and resistance to shock
11T206-20290/7H013-50021
180
100:21.7
77
13.7
20271/50013
low shrinkage and exotherm, excellent air release
11T206-20271/7H013-50013
180
100:23.3
77
5000
16.4
20217/50019
flexible, excellent coil penetration and air release, good thermal shock resistance
100:83.3
77
9000
11
20206/50021
excellent coil penetration and thermal shock resistance, moderate work life
11T206-20206/7H013-50021
180
100:27
77
5500
12.2
20206/50013
excellent coil penetration and thermal shock resistance
11T206-20206/7H013-50013
180
100:27
77
5500
12.2
20203/50201
most widely used potting material, industry workhorse
11G203-20203/7H015-50201
180
100:100
77
11000
13.5
20203/50015
low-cost, general use, easy to mix, excellent air release
11G203-20203/7H015-50015
180
100:50
77
15000
11.7
20203/50013
all purpose, general use, long work life.
11G203-20203/7H013-50013
180
100:23.5
77
1200
12.5
20202/50002
color-coded, easy to mix, highly filled
11T202-20202/7H002-50002
180
77
5500
13.0
20003/50013
extended work life, transparent, plasticizer free
11T206-20003/7H013-50013
180
100:40
77
600
9.2