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Metal adhesives

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Master Bond EP21ARLV Two part epoxy adhesive, sealant, coating and encapsulating system
Categories: Polymer; Thermoset; Epoxy; Epoxy Adhesive; Epoxy Encapsulant, Unreinforced

Material Notes: Master Bond EP21ARLV is a two component epoxy resin system for high performance bonding, sealing, coating and encapsulating. It has a convenient 100 to 50 mix ratio by weight and is formulated to cure at ambient temperatures or more quickly at elevated temperatures. The optimum cure is overnight at room temperature followed by 4 to 6 hours at 150-200°F. EP21ARLV is 100% reactive and contains no solvents or diluents. It has very low linear shrinkage upon cure. The primary purpose of utilizing EP21ARLV is to obtain exceptional acid resistance. The chart below describes its resistance to a wide range of acids. EP21ARLV bonds well to several substrates including metals, ceramics, composites, as well as many plastics and rubbers. The service temperature range is from -60°F to +250°F. The color of Part A is clear and Part B is amber clear. It is available in various colors upon request. EP21ARLV can be used as an adhesive, sealant, or coating. Significantly, it is free flowing and aptly suited for potting and encapsulation. It is particularly useful for coating tanks and vessels that contain acids. EP21ARLV is a candidate for aerospace, electronic, electrical, chemical processing and OEM where acid resistance is needed.

Product Advantages:

  • Convenient 2 to 1 mix ratio by weight
  • Versatile cure schedules
  • Dependable electrical insulator
  • Good flow, easy to apply
  • Bonds well to many substrates
  • Available in many colors
Key Features:
  • Convenient 2 to 1 mix ratio
  • Long open time
  • Good physical strength properties
  • Reliable electrical insulator

Information provided by Master Bond.

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 3000 - 6000 cPPart A
 4000 - 6000 cPPart B
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 80 - 90
Tensile Strength 8000 - 9000 psi
Tensile Modulus 350000 - 400000 psi
Adhesive Bond Strength 700 - 900 psiTensile lap shear, Al to Al
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+14 ohm-cm
Dielectric Constant 3.8
@Frequency 60 Hz
Dielectric Strength 440 V/mil
@Thickness 3.17 mm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 40.0 - 50.0 µm/m-°C
Maximum Service Temperature, Air 121 °C
Minimum Service Temperature, Air -51.0 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 3.00 - 4.00 hour
@Temperature 93.3 °C
Option 2
 4.00 - 6.00 hour
@Temperature 65.6 - 93.3 °C
Optimal: overnight at 75°F plus 4-6 hours at 150-200°F
 48.0 - 72.0 hour
@Temperature 23.9 °C
Option 1
Working Life 60.0 - 90.0 min100 gram batch
Shelf Life 12.0 Month
 
Descriptive Properties
Mixing ratio100:50

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PMASTM632 / 268820

Metal adhesives

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