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Master Bond adhesives

Master Bond EP21TDCF-3 Two Component, Higher Viscosity Epoxy System
Categories: Polymer; Thermoset; Epoxy; Epoxy Encapsulant, Unreinforced

Material Notes: Product Description: Master Bond EP21TDCF-3 is a two component epoxy for high performance bonding and sealing. It is formulated to cure rapidly at room temperature or faster at elevated temperatures. It has a non-critical mix ratio of one to one by weight or volume. The faster cure allows for a shortened fixture time. Once cured, EP21TDCF-3 has excellent toughness. This gives the system outstanding mechanical shock resistance along with superior thermal cycling capabilities—even when bonding dissimilar substrates. It has a good blend of physical properties including high shear and peel strengths. It bonds well to a wide variety of substrates, including metals, glass, ceramics and many rubbers and plastics. EP21TDCF-3 has the ability to withstand an array of chemicals, including water, fuels and oils, over the service temperature range of -100°F to +250°F. It is 100% reactive without any solvents or diluents. The hardened adhesive is an excellent electrical insulator. The color of Part A is gray and Part B is amber. EP21TDCF-3 is a versatile, exceptionally strong, user friendly system that is widely used in the OEM, aerospace, electronic, electrical and related industries.

Product Advantages:

  • Convenient mixing: non-critical equal weight or volume ratio.
  • Easy application, higher viscosity, thixotropic system.
  • Rapid curing at room temperature; shorter fixturing time.
  • Bonds well to a variety of substrates.
  • Noteworthy resistance to vibration, shock and thermal cycling.
  • Superior shear and peel strengths.
  • Good chemical resistance to water, fuels and oils.

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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Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 50 - 5550 - 55
Tensile Strength at Break 51.7 MPa
@Temperature 23.9 °C
7500 psi
@Temperature 75.0 °F
Tensile Modulus 1.72 - 2.07 GPa
@Temperature 23.9 °C
250 - 300 ksi
@Temperature 75.0 °F
Shear Strength >= 13.8 MPa>= 2000 psiAl/Al, Bond
Peel Strength 6.14 kN/m35.0 pliT-peel
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+14 ohm-cm1.00e+14 ohm-cm
Dielectric Constant 3.8
@Frequency 60 Hz,
Temperature 25.0 °C
3.8
@Frequency 60 Hz,
Temperature 77.0 °F
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 121 °C250 °F
Minimum Service Temperature, Air -73.3 °C-100 °F
 
Processing PropertiesMetricEnglishComments
Cure Time  60.0 - 120 min
@Temperature 23.9 °C
1.00 - 2.00 hour
@Temperature 75.0 °F
 60.0 - 120 min
@Temperature 93.3 °C
1.00 - 2.00 hour
@Temperature 200 °F
Pot Life 15 - 25 min15 - 25 min100 gram mass
Shelf Life 12.0 Month
@Temperature 23.9 °C
12.0 Month
@Temperature 75.0 °F
in 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 view all the property values for this datasheet as they were originally entered into MatWeb.

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PMASTB323 / 149570

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