Two component epoxy compound for bonding, sealing, coating and encapsulating

Key Features

  • Excellent thermal conductivity
  • Superb electrical insulation
  • Convenient handling
  • Superior flow properties

Product Description

Master Bond EP21AOLV-1 is a two component, thermally conductive, electrically isolating epoxy adhesive, sealant and coating. It has a convenient one to one mix ratio by weight or volume, with a longer open time and lower exotherm. Upon mixing, it has a smooth consistency that flows very nicely. The system cures easily at room temperature and can be accelerated by heat. The optimum cure schedule is overnight at room temperature followed by 3-5 hours at 150-200°F.

First and foremost, EP21AOLV-1 conducts heat very well, yet still retains effective electrical insulation values. While its primary use is for potting and encapsulating, it is also an excellent adhesive that develops high strength bonds. It adheres to a wide variety of substrates including metals, glass, ceramics and many plastics. Some other attractive features include a low coefficient of expansion, excellent dimensional stability, along with high compressive strength. EP21AOLV-1 resists a wide range of chemicals especially water, oils and fuels. The service temperature range for this epoxy is -60°F to +250°F. The color of Part A is gray; the color of Part B is off-white. This combination of attributes allows EP21AOLV-1 to be used in a wide variety of applications, notably in electronics, electro-optics and specialty OEM industries; especially where excellent thermal conductivity and electrical insulation are important considerations.

Product Advantages

  • Convenient handling: non-critical one-to-one mix ratio by weight or volume
  • Easy application: readily flowable when potting; brushable when bonding
  • Will cure at ambient temperatures or elevated temperatures
  • Outstanding thermal conductivity
  • Robust electrical insulation properties
  • Low coefficient of expansion, low shrinkage and superb dimensional stability

Industrial Certifications

Meets EU Directive 2015/863




EP21AOLV-1 is available is various sizes and units to accommodate customer's needs.

Case Studies

Master Bond EP21AOLV-1 was used in research done by a graduate student at University of Houston. Here is a quote from this work:

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