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Metal adhesives
Master Bond EP21QF Two component, room temperature curing epoxy
Categories: Polymer; Thermoset; Epoxy

Material Notes: Key Features:
  • Forgiving 1:1 mix ratio by weight or volume
  • Moderate viscosity and good flow
  • Reliable electrical insulator
  • Thermally conductive
Product Description: Master Bond EP21QF is a two component epoxy adhesive, sealant, coating, and encapsulating system combining outstanding physical properties, along with exceptionally easy processing. It cures at room temperature or more quickly at elevated temperatures. A 22 gram mass will cure in 1 hour at 65°C. A summary of additional curing schedule options is presented in the chart below. EP21QF is notable for its superb dimensional stability and low shrinkage upon curing. EP21QF bonds well to a wide variety of substrates including metals, composites, glass, ceramics and many rubbers and plastics. It withstands rigorous thermal cycling, as well as vibration and shock. This epoxy resists water, oils, fuels and many salts. The service temperature range is from -80°F to +300°F. The system is color coded, with Part A being black, and Part B white, and upon mixing, the color becomes gray. Most importantly, EP21QF conducts heat while retaining electrical insulation. It is a versatile system with potential usage in electronic, electrical, aerospace, and specialty OEM type applications.

Product Advantages:

  • Forgiving 1:1 mix ratio by weight or volume
  • Excellent flow properties
  • Robust physical strength profile
  • Low shrinkage and good dimensional stability
  • Good heat conduction
  • Superior dielectric properties

Information provided by Master Bond.

Vendors:
Available Properties
  • Specific Gravity, Part B
  • Specific Gravity, Mixed
  • Specific Gravity, Part A
  • Viscosity, Part A
  • Viscosity, Mixed
  • Viscosity, Part B
  • Hardness, Shore D
  • Tensile Strength
  • Tensile Modulus
  • Adhesive Bond Strength, Tensile lap shear, Al to Al
  • Volume Resistivity
  • Dielectric Constant
  • Dielectric Strength
  • CTE, linear
  • Thermal Conductivity
  • Maximum Service Temperature, Air
  • Minimum Service Temperature, Air
  • Cure Time, 22 grams
  • Cure Time, Option 2
  • Cure Time, Option 1
  • Working Life, after mixing, 100 gram batch
  • Shelf Life, in original, unopened containers
  
Property Data

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Manufacturer Notes:
Master Bond Inc.

Category Notes
Plastic

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Metal adhesives
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