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Master Bond EP37-3FLSP Optically Clear Epoxy Has Low Exotherm
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Description: Master Bond EP37-3FLSP is a very flexible, low viscosity, optically clear two component epoxy resin system designed for high performance bonding, coating and casting applications. It features a forgiving one-to-one mix ratio by weight or volume. As an adhesive, it forms very flexible high strength bonds that offer excellent impact resistance as well as resistance to severe thermal cycling and shock. It bonds well to a wide variety of substrates including metals, glass, ceramics, rubber and many plastics. EP37-3FLSP is a good potting, encapsulating and casting system. Its low exotherm makes it an ideal material for large castings. In this regard it also possesses superior electrical insulation properties. The combination of high flexibility and low exotherm helps prevent EP37-3FLSP from stressing sensitive electronic components during cure. Also noteworthy is the exceptionally long working life which, depending upon mass, could offer beyond 12 hours at room temperature conditions. EP37-3FLSP is serviceable from 4K to +200°F. This versatile system is widely used in optical, electronic, electrical, computer and OEM type applications.

Product Advantages:

  • Convenient mixing: easy-to-use non critical 2:1 mix ratio by weight or volume.
  • Exceptionally long working life.
  • Cures readily accelerated by heat.
  • Good optical clarity.
  • Very high flexibility.
  • Resists severe thermal and mechanical shocks.
  • Good overall physical strength properties and chemical resistance.
  • Good electrical insulation properties.
  • Low exotherm during cure for large castings.

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
Water Absorption <= 1.0 %24 hour immersion
Viscosity 400 - 500 cPmixed
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 20
Tensile Strength at Break >= 1000 psi
Elongation at Break >= 200 %
Shear Strength >= 500 psiBond, Al to Al
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+14 ohm-cm
Dielectric Constant 4.6
@Frequency 100 Hz,
Temperature 25.0 °C
Dielectric Strength >= 400 V/mil
@Thickness 3.17 mm
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 200 °F
Minimum Service Temperature, Air -270 °F
 
Optical PropertiesOriginal ValueComments
Transmission, Visible 90 %clear; thickness not quantified
 
Processing PropertiesOriginal ValueComments
Cure Time 24.0 - 72.0 hour
@Temperature 23.9 °C
Pot Life >= 720 min100 gram batch
Shelf Life 12.0 Month
@Temperature 23.9 °C
in original unopened container
 
Descriptive Properties
Mixing Ratio (A to B)2:1by weight or volume

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PMASTB388 / 149635

Specialty Compounds RTP Company

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