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Rulon Bearings

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Master Bond EP21ARHT Two component epoxy adhesive, sealant, coating and encapsulating system
Categories: Polymer; Thermoset; Epoxy; Epoxy Encapsulant, Unreinforced

Material Notes: Product Description: Master Bond EP21ARHT 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. It has resistance to a wide array of chemicals, particularly to acids (a more detailed list appears below). It is resistant to sulfuric and hydrochloric acids. EP21ARHT is 100% reactive and contains no solvents or diluents. It has very low linear shrinkage upon cure. Also, it has outstanding physical properties and electrical insulation values. EP21ARHT can be used as an adhesive, sealant, coating, potting or encapsulating material. EP21ARHT is especially useful for coating tanks and other vessels that may contain acids. It is serviceable over the wide temperature range of -60°F to +400°F. It adheres well to a wide variety of substrates including metals, glass, ceramics and many rubbers and plastics. The standard version of this system has a lower viscosity with good flow. A non-drip version called EP21ARHTND is also available. Part A is clear and Part B is amber clear. This epoxy compound is widely used in aerospace, electronic, electrical, chemical processing applications and in other applications where chemical resistance to acids is needed.

Product Advantages:

  • 100% reactive compound does not contain any solvents or diluents
  • Versatile cure schedules; ambient temperature cures or fast elevated temperature cures
  • High bonding strength to both similar and dissimilar substrates
  • Wide temperature service capability from -60°F to +400°F
  • Good electrical insulator. Low viscosity. Ideal for potting and encapsulation
  • Outstanding chemical resistance, particularly to acids

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 4000 - 6000 cPPart B
 60000 - 110000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D >= 75
Tensile Strength at Break >= 9000 psi
@Temperature 23.9 °C
Shear Strength 2500 psiAl/Al, Tensile lap
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+14 ohm-cm
Dielectric Constant 3.8
@Frequency 60 Hz,
Temperature 25.0 °C
Dielectric Strength 440 V/mil
@Thickness 3.17 mm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 40.0 - 45.0 µm/m-°C
Maximum Service Temperature, Air 400 °F
Minimum Service Temperature, Air -60.0 °F
 
Processing PropertiesOriginal ValueComments
Cure Time 2.00 - 3.00 hour
@Temperature 93.3 °C
 2.00 - 3.00 hour
@Temperature 93.3 °C
Overnight at 75°F followed by
 24.0 - 48.0 hour
@Temperature 23.9 °C
Pot Life 30 - 50 min100 gram mass
Shelf Life 12.0 Month
@Temperature 23.9 °C
in original, unopened containers
 
Descriptive Properties
Mixing Ratio (A to B)100:50by weight

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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PMASTB309 / 149556

Aluminum Castings

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