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Metal adhesives

Master Bond EP21TPLV Two Component Epoxy System  (discontinued **)
Categories: Polymer; Thermoset; Epoxy; Polysulfide Sealant/Adhesive

Material Notes: EP21TPLV-NV complies with RoHS3 Directive (EU) 2015/863. It is a new version of EP21TPLV, which has been discontinued.

Key Features:

  • One to one mix ratio
  • Flexible bonds
  • Withstands thermal cycling
  • Exceptional chemical resistance to fuels and oils
  • Excellent electrical insulation properties
  • Two part polysulfide system
Product Description: Master Bond EP21TPLV is a two component epoxy polysulfide system formulated to cure at room temperature or more rapidly at elevated temperatures, with a one to one mix ratio by weight or volume. It’s a versatile material that can be used as an adhesive, coating, encapsulant and especially as a sealant. It resists a wide array of chemicals including water, gasoline, fuels, oils, hydrocarbons, hydraulic fluids and many acids and bases. Significantly, unlike many chemical resistant epoxy based materials, this system has excellent toughness. These properties enable EP21TPLV to withstand rigorous thermal cycling as well as mechanical and thermal shocks. It bonds well to a variety of substrates, including metals, glass, ceramics and many rubber and plastic materials. The cured system has excellent electrical insulation properties. Its service temperature range is -80°F to +250°F. One unusual feature of EP21TPLV is the influence of adding heat to the curing cycle. When cured at room temperature the Shore D hardness is 60-65; when cured at 200°F for 2-3 hours, its hardness is 15-20 Shore D. Therefore, to obtain the optimum properties, EP21TPLV should be cured at room temperature. The color of Part A is tan and Part B is amber, although, other colors are available. Polysulfide systems, such as EP21TPLV, have been used as fuel tank sealants and coatings, as well as for potting electrical connectors and other components exposed to fuels, oils and lubricants. EP21TPLV can be used in aerospace, OEM, electronic, electrical, chemical and related industries where room temperature curing, toughness and resistance to fuels, lubricants and similar type chemicals are needed.

Product Advantages:

  • Convenient mixing: forgiving one to one mix ratio by weight or volume
  • Easy to apply — adhesive spreads evenly and smoothly
  • Ambient temperature curing imparts optimal chemical resistance and hardness
  • Produces tough bonds; resistant to thermal cycling
  • Bonds well to similar and dissimilar substrates
  • Superb resistance to oils, fuels and related chemicals

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 50 - 200 cP50 - 200 cPPart B
 3000 - 4000 cP3000 - 4000 cPPart A
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 60 - 6560 - 65
Tensile Strength >= 48.3 MPa>= 7000 psi
Elongation at Break >= 20 %>= 20 %
Tensile Modulus 1.03 - 1.38 GPa150 - 200 ksi
Adhesive Bond Strength >= 10.3 MPa>= 1500 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+14 ohm-cm1.00e+14 ohm-cm
Dielectric Constant 4.1
@Frequency 60 Hz
4.1
@Frequency 60 Hz
 
Thermal PropertiesMetricEnglishComments
CTE, linear 55.0 - 60.0 µm/m-°C30.6 - 33.3 µin/in-°F
Maximum Service Temperature, Air 121 °C250 °F
Minimum Service Temperature, Air -62.2 °C-80.0 °F
 
Processing PropertiesMetricEnglishComments
Cure Time 2880 - 4320 min48.0 - 72.0 hour
Working Life 30.0 - 60.0 min30.0 - 60.0 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
Mixing Ratio1:1 by weight or volumeParts A to B

**
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PMASTM842 / 185435

Metal adhesives

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