834B - Black Flame Retardant Epoxy

834B is a black, rigid, flame-retardant thermal potting compound that offers extreme environmental, mechanical and physical protection for printed circuit boards and electronic assemblies.

This 2-part epoxy is designed for applications where thermal management and self-extinguishing are critical. It also provides excellent electrical insulation and protects components from static discharge, vibration, abrasion, thermal shock, environmental humidity, salt water, fungus, and many harsh chemicals.

This high thermal conductivity potting compound has a convenient 2:1 volume mix ratio, making it compatible with most dispensing equipment. 834B can be cured at room temperature or higher.

for a low CTE version try 834HTC and for a flexible version use 834FX.

We also offer a wide variety of 2-part low viscosity, non-flame rated epoxy potting compounds. 832B and 832HD are our general-purpose black epoxies. 832C and 832WC are our clear epoxies.

Our high temperature epoxy is 832HT and our thermally conductive epoxy is 832TC.

For a 1-part epoxy try 9510.

We also offer polyurethane and silicone potting compounds.

Features & Benefits

  • Meets UL 94V-0 standard — flame-retardant
  • Convenient 2A:1B volume mix ratio
  • Thermal conductivity of ~ 0.8 W/(m.K)
  • Low exotherm
  • Very high compressive and tensile strength
  • Excellent adhesion to a wide variety of substrates including metals, composites, glass, ceramics, and many plastics
  • Excellent electrical insulating characteristics
  • Broad service temperature range of -40 to 175 °C (-40 to 347 °F)
  • Contains non-halogenated flame-retardant fillers
  • Solvent-free
Catalog NumberSizePackaging
834B-375ML375 mL (12.6 fl oz)2 Bottle Kit
834B-2.7L2.7 L (2.85 qt)3 Can Kit
834B-10.8L10.8 L (2.85 gal)3 Can Kit
834B-60L60 L (15.8 gal)3 Pail Kit

Safety Data Sheet

Technical Data Sheet


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