Two component epoxy system featuring the special combination of very fast setup times and high temperature resistance

Key Features

  • Convenient handling, gun dispensable
  • Cures rapidly even in small masses
  • Meets NASA low outgassing specifications
  • Withstands 1,000 hours 85°C/85% RH

Product Description

Master Bond EP65HT-1 is a specialty type system that features the unusual combination of ultra fast curing and high temperature resistance. While typical fast setting epoxies normally possess glass transition temperatures (Tg) below 85°C, EP65HT-1 has an exceptional Tg of approximately 125°C. In addition, unlike typical fast cure epoxies, EP65HT-1 retains fast setup times even when mixed in relatively small masses. EP65HT-1 normally will setup in 3-5 minutes in 10-20 gram masses. A full cure generally occurs within 6-12 hours with high tensile shear strengths of over 1,200 psi. This system offers good physical properties, including low shrinkage upon cure, excellent dimensional stability and a high tensile modulus. The service temperature range is -60°F to +400°F. EP65HT-1 offers sound electrical insulating properties and a useful chemical resistance profile. EP65HT-1 fully meets the NASA low outgassing specifications and is particularly well suited for vacuum applications.

EP65HT-1 bonds well to a wide variety of substrates including metals, glass, ceramics, vulcanized rubbers and many plastics. Dispensing EP65HT-1 can be greatly facilitated by utilizing a dispensing gun capable of mixing fast setting materials with a ten to one mix ratio. This system is 100% reactive and does not contain any solvents. Part A is clear, and Part B is dark brown in color. It is especially useful for both prototyping and manufacturing in the aerospace, electronic, optical, electro-optical, vacuum related as well as specialty OEM applications where the special blend of fast curing and high temperature resistance is desirable.

Product Advantages

  • Ultra fast setting and curing even in small masses; very short fixturing time
  • Exceptionally high heat resistance
  • Good physical strength properties
  • Superior electrical insulation properties
  • Available with convenient dispensing gun
  • NASA low outgassing certified

Industrial Certifications

ASTM E595 Compliant

1,000 Hours at 85°C/85% RH



Double Barrel Cartridge

Gun Applicator



EP65HT-1 is available is various sizes and units to accommodate customer's needs.

Case Studies

Can an adhesive maintain its strength when bonding titanium to carbon-carbon composites under extreme temperature and harsh conditions? This is precisely what researchers1 from QSS Group, Inc., the Ohio Aerospace Institute and the NASA Glenn Research Center were determined to find out. They tested multiple formulations, and discovered that Master Bond EP45HTAN proved to be ready for the challenge.

Visual Media

Video on applying super fast curing epoxies

In this demonstration, Master Bond EP65HT-1 epoxy is used to show how a fast curing compound can set up quickly at room temperature. This two part system is commonly utilized for advanced engineering applications. It is a sure winner to speed up your assembly operations.

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