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Master Bond Launches Epoxy Adhesive for Structural Bonding Applications

Published on 2018-07-20. Author : SpecialChem

TAGS:  Epoxy Adhesives    

Master Bond EP21ND-LP was created for structural bonding applications involving large surface areas. It has an advantageously long working life of 2-4 hours at 75°F for a 100 gram mass.

Master Bond EP21ND-LP


Its smooth paste consistency makes it convenient to apply and use. The standard color of Part A is gray and Part B amber, although the epoxy can be formulated in a wide array of colors. It is available in ½ pint, pint, quart and gallon kits. It can be used in:
Master Bond EP21ND-LP  epoxy
Master Bond EP21ND-LP part gray and part amber
epoxy adhesive
  • Electronic
  • Electrical
  • Computer 
  • Appliance 
  • Chemical
  • Aerospace 
  • Specialty OEM industries

Shore D hardness is 70-80 when mixed in a one to one mix ratio by weight or volume. Moreover, certain properties of the epoxy can be altered by adjusting the mix ratio. For example, adding more of Part A to obtain a 2:1 mix ratio will produce a formulation with a more rigid cure. Conversely, adding more of Part B in a 1:2 mix ratio will provide the epoxy with a more forgiving cure. EP21ND-LP cures at room temperature or more rapidly at elevated temperatures.

Properties of Master Bond EP21ND-LP


  • Achieves high strength, 
  • Makes durable bonds 
  • Has excellent gap filling properties 
  • The tensile strength ranges between 6,000 to 7,000 psi
  • It can withstands thermal cycling has a coefficient of thermal expansion of 50-55 x 10-6/in/in/°C. 
  • Offers reliable electrical insulation with a volume resistivity greater than 1014 ohm-cm.


Source: Master Bond
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