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Metal adhesives

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Master Bond EP41S-5 Two Component Epoxy
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive; Epoxy Encapsulant, Unreinforced

Material Notes: Key Features:
  • Convenient handling
  • Good flow properties
  • Withstands methylene chloride
  • Superior electrical insulation properties
Product Description: Master Bond EP41S-5 is a two part epoxy system for bonding, sealing, coating and encapsulating with a forgiving 100 to 25 mix ratio by weight. EP41S-5 will cure at room temperature or more rapidly at elevated temperatures. The optimum curing schedule is overnight at 75°F followed by 3-4 hours at 150-200°F. It has exemplary resistance to a wide array of chemicals, especially acids, bases, alcohols, fuels and many solvents. Most noteworthy is its resistance to methylene chloride, phenol (10%) and nitric acid (30%). Upon mixing, EP41S-5 is a moderate viscosity liquid with good flow. It contains no solvents or diluents and is 100% reactive. It has low shrinkage upon curing. This epoxy combines formidable physical strength properties and electrical insulation values. It bonds well to a wide variety of substrates including metals, composites, glass, ceramics, as well as many rubbers and plastics. EP41S-5 is serviceable over a wide temperature range of -60°F to +300°F. The natural color of EP41S-5 is black. Additional colors are also available. If required, a non-drip version of this formulation called EP41S-5ND is offered as well. This epoxy system can be used in aerospace, electronic, chemical processing, specialty OEM and in other applications where robust chemical resistance is required (please refer to the chart below).

Product Advantages:

  • User friendly handling
  • Convenient curing
  • Good adhesion to many types of substrates
  • Flows smoothly; can be used for potting and encapsulation
  • Well suited for coating tanks and vessels
  • Exceptional chemical resistance, especially to chlorinated solvents

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 PropertiesOriginal ValueComments
Viscosity 1500 - 2500 cPPart B
 25000 - 30000 cPmixed
 50000 - 110000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 85 - 95
Tensile Strength 10000 - 12000 psi
Adhesive Bond Strength 900 - 1100 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+14 ohm-cm
Dielectric Constant 3.5
@Frequency 60 Hz
Dielectric Strength 440 V/mil
@Thickness 3.17 mm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 35.0 - 40.0 µm/m-°C
Maximum Service Temperature, Air 300 °F
Minimum Service Temperature, Air -60.0 °F
 
Processing PropertiesOriginal ValueComments
Cure Time 2.00 - 3.00 hour
@Temperature 65.6 - 93.3 °C
 72.0 - 120 hour
@Temperature 23.9 °C
Working Life 30.0 - 45.0 minAfter mixing, 100 g batch
Shelf Life 12.0 Month
@Temperature <=23.9 °C
in original, unopened containers
 
Descriptive Properties
Chemical ResistanceAcetic acid-glacial (10%)Good
 Butyl cellosolveExcellent
 Distilled waterExcellent
 DMSOFair
 MEKExcellent
 MethanolVery good
 Methylene chlorideGood
 Nitric acid (30%)Excellent
 Phenol 10%Excellent
 PyridinesNot recommended
 Sulfuric acid (98%)Excellent
 TolueneExcellent
Cure Scheduleovernight at 75°Fplus 2-3 hours at 200°F
Mixing Ratio100:25 by weightParts A to B

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PMASTM877 / 185470

Metal adhesives

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