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RoHS Compliant Black Epoxy
Encapsulating and Potting Compound
Black832B
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ATTENTION
Mixing ratio for this product is 2 parts A to 1 part of B. Please be advised that there is a misprint on our label for one of the production runs.

Protects sensitive electronic components from impact, shock, vibration, heat, conductivity, moisture, chemicals, and visual inspection.

Features

  • Non-porous, water and chemical resistant
  • Extremely impact resistant (contains a form of nylon)
  • Colored black, to prevent visual inspection
  • Affords high security, once cured, extremely difficult to remove
  • Non-conductive, an electrical insulator
  • Low toxicity
  • Suitable for explosion proof components (spark arresting)
  • Easy and simple to mix
  • Long pot life
  • Can be cured in one hour at 65°C (150°F)
  • This product is RoHS compliant
Specifications

Uncured Properties - Resin [Part A]
Viscosity2,500 cps
Specific Gravity1.1273
ColorBlack
Uncured Properties - Hardener [Part B]
Viscosity11,000 cps
Specific Gravity0.9564
ColorClear, amber tint
Cured Properties - Physical
Mixed Viscosity3,300 cps
Mixed Specific Gravity1.0577
Volume Mix Ratio (resin:hardener)2.0:1
Mass Mix Ratio (resin:hardener)2.3:1
Shore Hardness80 - 82 Shore D
Tensile strength (ASTM D 638)8475 psi
Elongation3.3%
Compression strength (ASTM D 695)14,675 psi
Modulus375,000 psi
Flexural strength (ASTM D 790)16,500 psi
Modulus427,000 psi
Izod impact strength (ASTM D 256)
0.443 ft-lbs / inch notch
0.259" thick
Lap Shear Strength (ASTM D 732)957 psi
Working time (100g)60 min.
Curing Time (100g)  
@ room temp. 24 hours
@ 65°C 60 minutes
@ 80°C 45 minutes
@ 100°C 35 minutes
Cured Properties - Temperature
Coefficient of Thermal Expansion
(ASTM E 831)
0.036" / 10" @ 32°F,
0.013" / 10" @ 72°F
Constant Service Temperature140°C (284°F)
Intermediate Service Temperature
145°C (293°F)
Heat Deflection Temp. (264 psi)
(ASTM D 648)
46.638°C (115.95°F)
Cured Properties - Electrical
Surface Resistivity (ASTM D 257)5.3 x 1012 ohm · cm
Corrected Dissipation Factor, D 0.008 @ 1KHz
(ASTM D150-98) 0.013 @ 10KHz
  0.018 @ 100KHz
  0.017 @ 1MKHz
Dielectric Constant (ASTM D150-98) 2.95 @ 1KHz
  2.89 @ 10KHz
  2.83 @ 100KHz
  2.77 @ 1MKHz
Insulative Yes
Conductive No
Breakdown Voltage (ASTM D149-97a) 51.9 kV
Dielectric Strength (ASTM D149-97a) 471 V/mil
Chemical and Solvent Resistance
 Change after
3 days
Change after
45 days
Hydrocloric Acid < 0% < 1 %
Isopropyl Alcohol < 0.3 %< 1 %
Ethyl Lactate < 3 %< 7 %
Acetone< 7% destroyed
Xylene< 2% < 9 %
Iso hexanes < 5 %< 8 %
Mineral spirits < 0.3 %< 0.3 %

832B Peak Exotherm

Sample Size (grams) Peak Exotherm
(Temp. in 0°C)
Time in Minutes
50 44 155
100 63 110
500 110 65


Available Sizes

Catalog NumberSizes AvailableDescription
832B-375ML375ml (12 oz)Liquid
832B-3L3L (0.8 gal)Liquid
832B-60L60L (16 gal)Liquid