Two component epoxy system for high performance applications

Key Features

  • bonding, sealing, encapsulation
  • Superior chemical resistance
  • Curable at ambient or slightly elevated temperatures
  • Excellent bond strength
  • Moderate viscosity
  • Withstands 1,000 hours 85°C/85% RH

Product Description

Master Bond EP30M4 is a two component epoxy system for high performance bonding, sealing and encapsulation. This system features a forgiving 100 to 60 mix ratio by weight. It can cure at ambient temperatures or more rapidly at elevated temperatures. However, to optimize the chemical resistance properties it is recommended to add heat when curing. The ideal cure schedule is overnight at room temperature followed by a few hours at 150-200°F. EP30M4 resists water, acids, bases, fuels and oils, along with many aggressive solvents. Some of the potent chemicals it can resist include Skydrol, xylene, 70% sulfuric acid, 98% sulfuric acid, 50% sodium hydroxide and bleach. This compound is 100% reactive and does not contain any solvents or other volatiles. EP30M4 offers excellent adhesion to both similar and dissimilar substrates including metals, glass, ceramics and many plastics. It is also noteworthy for its superior electrical insulation properties. It has excellent flow and can be used for a variety of potting and encapsulation applications. EP30M4 is serviceable over the wide temperature range of -80°F to +300°F. The color of Part A is clear and Part B is amber. EP30M4 is widely used in the aerospace, OEM, electronic, electrical and electro-optic industries.

Product Advantages

  • Non-critical mix ratio: 100 to 60 by weight
  • Moderate viscosity, good flow; convenient for potting and encapsulation
  • Superior chemical resistance
  • Outstanding electrical insulation properties
  • High bond strength to a wide variety of substrates
  • Excellent physical strength properties

Industrial Certifications

1,000 Hours at 85°C/85% RH





Premixed & Frozen Syringe


EP30M4 is available is various sizes and units to accommodate customer's needs.

Request Information