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Master Bond adhesives

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Master Bond EP21CLV Two Component Epoxy System
Categories: Polymer; Thermoset; Epoxy; Epoxy Encapsulant, Unreinforced

Material Notes: Product Description: Master Bond EP21CLV is a two component, lower viscosity epoxy resin system for high performance bonding, sealing, coating, encapsulation and casting. It features easy handling and versatility with application usage. It is formulated to cure readily at room temperature or more quickly at elevated temperatures. It has a very forgiving one to one mix ratio by weight or volume. EP21CLV has the unusual characteristic of being able to adjust the properties of the cured system by altering the mix ratio. Adding more of Part A (e.g. a two to one mix ratio) gives a more rigid cure, for enhanced machinability. While adding more of Part B (e.g. a one to two mix ratio) gives a more forgiving cure, for greater impact resistance. EP21CLV produces high strength, durable bonds which hold up well to thermal cycling and resists many chemicals including water, oils, fuels, acids, bases and salts. It is serviceable over the wide temperature range of -65°F to +250°F. It bonds well to a variety of substrates including metals, composites, glass, ceramics, wood, rubbers and many plastics. Once cured, EP21CLV is an outstanding electrical insulator. This, coupled with its low viscosity, makes it an excellent encapsulating and potting epoxy. EP21CLV contains no solvents or diluents. While the standard color of the cured material is amber-clear, a wide variety of additional color choices are also available. It is widely used in the electronic, electrical, aerospace, metalworking, optical, specialty OEM and related industries.

Product Advantages:

  • Convenient mixing: non-critical one to one mix ratio by weight or volume
  • Easy application: only contact pressure required while curing; adhesive spreads readily
  • Ambient temperature cures or fast elevated temperature cures as required
  • High bond strength to a wide variety of substrates
  • Superior physical strength properties
  • Good electrical insulation properties; ideal for potting and encapsulation

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, Tensile lap
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+15 ohm-cm
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
 24.0 - 48.0 hour
@Temperature 23.9 °C
Pot Life 60 - 75 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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