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Metal adhesives

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Master Bond EP21TPLV-NV Two component, epoxy polysulfide system
Categories: Polymer; Thermoset; Epoxy

Material Notes: Key Features:
  • One to one mix ratio
  • Flexible bonds
  • Withstands thermal cycling
  • Exceptional chemical resistance to fuels and oils
  • Excellent electrical insulation properties
  • Fully complies with RoHS regulations
Product Description: Master Bond EP21TPLV-NV 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-NV 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-NV 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-NV 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-NV, 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-NV 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
  • Good hardness and elongation
  • Superb resistance to oils, fuels and related chemicals

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 500 - 2000 cPPart B
 3000 - 4000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 40 - 50
Tensile Strength 3000 - 4000 psi
Elongation at Break 40 - 80 %
Tensile Modulus 20000 - 40000 psi
Adhesive Bond Strength >= 350 psiTensile lap shear, Al to Al
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+14 ohm-cm
Dielectric Constant 4.1
@Frequency 60 Hz
 
Thermal PropertiesOriginal ValueComments
CTE, linear 55.0 - 60.0 µm/m-°C
Maximum Service Temperature, Air 250 °F
Minimum Service Temperature, Air -80.0 °F
 
Processing PropertiesOriginal ValueComments
Cure Time 48.0 - 72.0 hour
@Temperature 23.9 °C
Working Life 30.0 - 60.0 minafter mixing, 100 gram batch
 
Descriptive Properties
Mixing ratio1:1 by weight or volumePart A to B

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PMASTM5915 / 306804

Metal adhesives

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