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Master Bond adhesives

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Master Bond EP21LV-LO Two Component, Lower Viscosity, Room Temperature Curing Epoxy System
Categories: Polymer; Thermoset; Epoxy; Epoxy Encapsulant, Unreinforced

Material Notes: Product Description: Master Bond EP21LV-LO is a two component, lower viscosity, room temperature curing epoxy system for high performance bonding, sealing, coating and encapsulation. This user friendly system has an easy and convenient one to one mix ratio by weight. EP21LV-LO features outstanding physical strength properties, along with being an excellent electrical insulator. This combination of properties enables it to be readily used as a potting and encapsulation compound. EP21LV-LO resists many chemicals including water, oils, fuels, acids, bases and salts quite well. It bonds well to a variety of substrates including metals, glass, ceramics and many types of rubber and many plastics. To optimize its properties, the best cure schedule is 12-24 hours at room temperature, plus another 2 hours at 150-200°F. Most importantly, EP21LV-LO passes NASA low outgassing specifications. The color of Part A is clear and Part B is amber in color. It is serviceable over the wide temperature range of -60°F to +250°F. This versatile system is widely used in aerospace, microelectronics, semiconductor, optical and vacuum applications.

Product Advantages:

  • Lower viscosity; convenient mixing; ideal for bonding, sealing, coating and encapsulation.
  • Easily applied; adhesive spreads smoothly.
  • High bonding strength to a wide variety of substrates.
  • Excellent adhesion to similar and dissimilar substrates.
  • Good electrical insulation properties.
  • Superior durability, thermal shock and chemical resistance.
  • Passes NASA low outgassing specifications.

Information provided by MasterBond®

Vendors: Master Bond is a leading manufacturer of adhesives, sealants, coatings and potting compounds. Master Bond’s vast product line consists of over 3,000 epoxy, polyurethane, silicone, cyanoacrylate and latex adhesives that vary in viscosity, cure speed, strength, chemical resistance, electrical properties, etc. Our custom adhesives offer design flexibility and provide excellent bonding performance. Visit www.masterbond.com.

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Physical PropertiesOriginal ValueComments
Viscosity 10000 - 14000 cPPart A
 11000 - 15000 cPPart B
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D >= 70
Tensile Strength at Break >= 7500 psi
@Temperature 23.9 °C
Tensile Modulus 300000 - 350000 psi
@Temperature 23.9 °C
Shear Strength >= 2800 psiAl/Al, bond
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+15 ohm-cm
Dielectric Constant 2.79
@Frequency 60 Hz
Dielectric Strength 440 V/mil
@Thickness 3.17 mm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 50.0 - 55.0 µm/m-°C
Maximum Service Temperature, Air 250 °F
Minimum Service Temperature, Air -65.0 °F
 
Processing PropertiesOriginal ValueComments
Cure Time 2.00 - 3.00 hour
@Temperature 93.3 °C
 12.0 - 24.0 hour
@Temperature 23.9 °C
plus 2 hrs at 150-200°F
 48.0 - 72.0 hour
@Temperature 23.9 °C
Pot Life 60 - 90 min100 gram mass
Shelf Life 12.0 Month
@Temperature 23.9 °C
in original unopened containers
 
Descriptive Properties
Mixing Ratio (A to B)1:1by weight or volume

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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PMASTB313 / 149560

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