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Metal adhesives

Master Bond EP42HT-2LO Low Outgassing, Heat Resistant Two Component Epoxy
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive; Epoxy, High Temperature

Material Notes: Key Features:
  • Remarkable chemical resistance
  • Resists up to +450°F
  • Meets NASA low outgassing requirements
  • Castable in thicknesses exceeding 2-3 inches
  • Room temperature curing
  • High strength properties
Product Description: Master Bond EP42HT-2LO is a room temperature curable two component epoxy, adhesive, sealant, coating and casting material featuring high temperature resistance along with outstanding chemical resistance. It cures readily at ambient temperatures or more quickly at elevated temperatures. EP42HT-2LO is a superior epoxy adhesive system and is castable to thicknesses exceeding 2-3 inches. EP42HT-2LO has excellent physical strength properties and dimensional stability. It has an easy to use 100:40 mix ratio by weight or 100:50 by volume. The cured epoxy compound is resistant to various types of fuels, oils, acids, bases, hydrocarbons and many solvents. EP42HT-2LO is an excellent electrical insulator. Especially noteworthy is its serviceability from -60°F up to +450°F. To optimize physical properties including heat resistance and low outgassing, especially if room temperature cured, a post cure at 200°F for 2-3 hours is recommended. EP42HT-2LO can be used in aerospace, optical, electronic, electro-optic and specialty OEM type applications. Since EP42HT-2LO passes NASA low outgassing specifications, it can be used in special situations, such as vacuum environments where that property is obligatory. The color of Part A is clear and Part B is amber clear.

Product Advantages:

  • Convenient non-critical 100:40 mix ratio by weight or 100:50 by volume
  • Outstanding physical strength properties
  • Excellent chemical resistance to acids, alkalis and many solvents
  • Superior thermal stability; serviceable up to +450°F
  • Castable to thicknesses exceeding 2-3 inches
  • Passes NASA low outgassing specifications

Information provided by Master Bond Inc.

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 PropertiesMetricEnglishComments
Viscosity  30 - 70 cP
@Temperature 23.9 °C
30 - 70 cP
@Temperature 75.0 °F
Part B
 1000 - 1800 cP
@Temperature 52.2 °C
1000 - 1800 cP
@Temperature 126 °F
Part A
 55000 - 110000 cP
@Temperature 23.9 °C
55000 - 110000 cP
@Temperature 75.0 °F
Part A
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D >= 75>= 75
Tensile Strength >= 82.7 MPa>= 12000 psi
Elongation at Break <= 5.0 %<= 5.0 %
Tensile Modulus 2.41 - 2.76 GPa350 - 400 ksi
Adhesive Bond Strength >= 13.8 MPa>= 2000 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1.00e+14 ohm-cm>= 1.00e+14 ohm-cm
Dielectric Constant 3.8
@Frequency 60 Hz
3.8
@Frequency 60 Hz
 
Thermal PropertiesMetricEnglishComments
CTE, linear 35.0 - 40.0 µm/m-°C19.4 - 22.2 µin/in-°F
Maximum Service Temperature, Air 232 °C450 °F
Minimum Service Temperature, Air -51.1 °C-60.0 °F
 
Optical PropertiesMetricEnglishComments
Refractive Index 1.621.62
 
Processing PropertiesMetricEnglishComments
Cure Time  120 - 180 min
@Temperature 93.3 °C
2.00 - 3.00 hour
@Temperature 200 °F
 2880 - 4320 min
@Temperature 23.9 °C
48.0 - 72.0 hour
@Temperature 75.0 °F
Working Life 45.0 - 72.0 min45.0 - 72.0 minAfter mixing, 100 g batch
Shelf Life 12.0 Month
@Temperature <=23.9 °C
12.0 Month
@Temperature <=75.0 °F
in original, unopened containers
 
Descriptive Properties
Cure Scheduleovernight at 75°Fplus 2-3 hours at 200°F
Mixing Ratio100:40 by weightParts A to B
 100:50 by volumeParts A to B

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PMASTM881 / 185474

Metal adhesives

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