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Metal adhesives

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Master Bond EP41S-F Two Part Epoxy
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive; Epoxy Encapsulant, Unreinforced

Material Notes: Key Features:
  • Very fast curing; quick handling time
  • Excellent electrical insulation properties
  • Impressive physical strength properties
  • Convenient processing, gun dispensable
Product Description: Master Bond EP41S-F is a two component epoxy system that features a number of desirable properties. It combines rapid curing, good chemical resistance and top notch electrical insulation properties. EP41S-F has an easy to use 100 to 25 forgiving mix ratio by weight. It polymerizes rapidly after mixing and typically can be removed from a fixture in 20-30 minutes. Its cure time at 75°F is 24 hours, and at 200°F it is 45-60 minutes. To obtain optimum properties, curing overnight at 75°F followed by 1-2 hours at 150-200°F is recommended. Typically faster curing epoxies are somewhat less chemically resistant than other types of systems, but EP41S-F is one of the few exceptions in that regard. It withstands many groups of chemicals quite well, especially oils, fuels, water and hydraulics. EP41S-F is 100% reactive and does not contain any solvents or diluents. It also has minimal shrinkage upon curing and bonds well to a wide variety of substrates including metals, composites, ceramics, glass and many plastics. EP41S-F is very well suited for use in small sized encapsulating applications. The color of Part A is clear and Part B is amber. The service temperature range is -60°F to +250°F. This versatile epoxy can be used in aerospace, electronic, chemical processing, especially including lining of tanks and other chemical equipment, where the desirable combination of fast curing and superior chemical resistance is advantageous.

Product Advantages:

  • Non-critical mix ratio of 100 to 25 by weight
  • Easy to apply, especially by brushing, dipping or by gun dispenser
  • Very fast curing at ambient temperatures; relatively short fixture times
  • High bond strength to many different substrates
  • Excellent electrical insulation properties
  • Available in many different colors

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 3000 - 5000 cPPart B
 10000 - 15000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D >= 75
Tensile Strength 8000 - 9000 psi
Tensile Modulus 300000 - 350000 psi
Adhesive Bond Strength >= 2500 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+14 ohm-cm
Dielectric Constant 3.6
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 250 °F
Minimum Service Temperature, Air -60.0 °F
 
Processing PropertiesOriginal ValueComments
Cure Time 24.0 hour
@Temperature 23.9 °C
 45.0 - 60.0 min
@Temperature 93.3 °C
Working Life 10.0 - 15.0 minAfter mixing, 100 g batch
Shelf Life 12.0 Month
@Temperature <=23.9 °C
in original, unopened containers
 
Descriptive Properties
Cure Scheduleovernight at 75°Fplus 1-2 hours at 150-200°F
Mixing Ratio100:20 by weightParts A to B

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PMASTM878 / 185471

Metal adhesives

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