One component, optically clear epoxy for bonding and sealing that cures at 80°C to 85°C

Key Features

  • Ultra low viscosity
  • Not premixed and frozen
  • High glass transition temperature
  • Meets NASA low outgassing

Product Description

Master Bond EP4CL-80 is a one component, exceptionally low viscosity epoxy for bonding and sealing. This free flowing system cures readily at 80°C to 85°C in one hour or 5-10 minutes at 100°C. It is not premixed and frozen and after using, it simply should be returned to the refrigerator to be used again. EP4CL-80 possesses excellent dimensional stability and low shrinkage upon curing.

This epoxy bonds well to a variety of substrates such as metals, composites, ceramics and many plastics. Even though it has very low viscosity, it has exceptionally high tensile strength as well as a high modulus. Its optical properties permit good light transmission from 360 nm to 1500 nm. Its low viscosity allows it to be applied by brushing, spraying or even by spin coating.

EP4CL-80 has good chemical resistance to water, oils and fuels, as well as acids and bases. Its color is clear. This epoxy is a reliable electrical and thermal insulator. The service temperature range is -62°C to +232°C (-80°F to +450°F). EP4CL-80 can be considered in optical, aerospace, electronics and specialty OEM applications where an extremely low viscosity epoxy is needed. It is especially useful for laminating and impregnating applications. In fiber optics, a typical usage is for sealing fibers into ferrules. This system is also an attractive candidate for sealing and protecting coil windings in harsh environments.

Product Advantages

  • Single component, no mixing needed
  • Convenient handling and curing schedules
  • User friendly packaging
  • Can be used for sealing and impregnation applications
  • Transparent

Industrial Certifications

ASTM E595 Compliant

Meets EU Directive 2015/863





EP4CL-80 is available is various sizes and units to accommodate customer's needs.

Request Information