Versatile, two part epoxy system for bonding, sealing, coating and encapsulating

Key Features

  • Rapid curing; fast handling time
  • Exceptional chemical resistance profile
  • Impressive physical strength properties
  • Widely used for coating tanks and vessels
  • Outstanding electrical insulation properties
  • Convenient processing

Product Description

Master Bond EP41S is a two component epoxy system that features a number of desirable properties. This system combines rapid curing along with exceptional chemical resistance, which is unusual in the realm of epoxy formulations. EP41S is easy to use with a 100 to 20 noncritical mix ratio by weight. It polymerizes rapidly after mixing and typically can be removed from a fixture in 40-50 minutes. Its cure time at 75°F is 24 hours, and at 200°F it is 60-90 minutes. To obtain optimum properties, curing overnight at 75°F followed by about 1-2 hours at 150-200°F is recommended.

As noted above, EP41S has brilliant chemical resistance. Typically, faster curing epoxies are somewhat less chemically resistant than other types of systems. However, EP41S excels at withstanding many chemicals, especially oils, fuels, acids, bases and many solvents. (Please refer to the chemical resistance chart for further details.)

EP41S is 100% reactive and does not contain any solvents or diluents. It also has minimal shrinkage upon curing and bonds well to a wide variety of substrates including metals, composites, ceramics, glass and many plastics. EP41S is a highly reliable electrical insulator and is particularly well suited for use in small sized potting applications.

The color of Part A is clear and Part B is amber. The service temperature range is -60°F to +250°F. This versatile epoxy can be used in aerospace, electronic, chemical processing, especially including lining of tanks and other chemical equipment, where the desirable combination of fast curing and robust chemical resistance is advantageous.

Product Advantages

  • Non-critical mix ratio of 100 to 20 mix ratio by weight
  • Easy to apply, especially by brushing or dipping
  • Very fast curing at ambient temperatures; relatively short fixture times
  • High caliber chemical resistance, particularly to solvents, alcohols and fuels
  • High bonding strength to many different substrates
  • Excellent electrical insulation properties





Premixed & Frozen Syringe


EP41S is available is various sizes and units to accommodate customer's needs.

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