May 2, 2016
Two component, room temperature curing epoxy compound featuring an ultra low coefficient of thermal expansion

Key Features

  • Low shrinkage upon curing
  • High compressive strength
  • Outstanding dimensional stability
  • Withstands 1,000 hours 85°C/85% RH

Master Bond EP42HT-2LTE is an innovative, two component epoxy system with an ultra low coefficient of thermal expansion. It can be used as an adhesive, sealant, coating and, in some cases, as a casting system. EP42HT-2LTE has a forgiving 100 to 40 mix ratio by weight, or a 100 to 50 mix ratio by volume. After mixing, the consistency is that of a paste with some flow. It will cure at room temperature in 4-7 days or more quickly at elevated temperatures, e.g. 4-6 hours at 150-200°F. However, to optimize properties, the recommended cure is overnight at room temperature followed by 3-5 hours at 150-200°F. The mainstay property of this epoxy system is its exceptionally low coefficient of expansion of 9-12 x 10-6 in/in/°C. It has an array of other highly desirable properties including stellar electrical insulation, very good chemical resistance and unsurpassed dimensional stability. This epoxy will bond well to a wide variety of substrates, including metals, composites, ceramics, glass and many plastics. It is also noteworthy for its low linear(<0.01%) and volumetric(<0.1%) shrinkage. The latter property is particularly useful in potting and encapsulation applications. Also, the compound allows for precise alignment with minimal fixturing and simple curing. Its service temperature range is from 4K to +300°F. The color of Part A is light cream and Part B is similar, but slightly darker. EP42HT-2LTE and its very special property profile allows it to be a desirable selection for the more challenging electronic, aerospace, optical, cryogenic and specialty OEM applications. EP42HT-2LTE passes NASA low outgassing tests and is recommended for applications involving vacuums, optics and other usages that require this important property.

Product Advantages

  • Non-critical 100 to 40 mix ratio by weight or 100 to 50 by volume
  • Cryogenically serviceable
  • High degree of dimensional stability
  • Desirably low shrinkage
  • Extraordinarily low coefficient of thermal expansion
  • Meets NASA low outgassing specifications

Learn More

Request More Information

By clicking above, I acknowledge and agree to Endeavor Business Media’s Terms of Service and to Endeavor Business Media's use of my contact information to communicate with me about offerings by Endeavor, its brands, affiliates and/or third-party partners, consistent with Endeavor's Privacy Policy. In addition, I understand that my personal information will be shared with any sponsor(s) of the resource, so they can contact me directly about their products or services. Please refer to the privacy policies of such sponsor(s) for more details on how your information will be used by them. You may unsubscribe at any time.