Two component epoxy system for potting, encapsulating and casting

Key Features

  • Meets UL 94V-0 flame retardant specification
  • Features a non-halogen filler
  • Produces very low smoke levels
  • Cures at room temperature

Product Description

Master Bond EP21FRNS-2 is a two component, room temperature curing, flame retardant compound for potting, encapsulating and casting. Particularly noteworthy are its low smoke generation and that it contains a nonhalogenated filler. It has a convenient one to one mix ratio by weight. EP21FRNS-2 offers exceptional durability, toughness and strength. It is remarkably resistant to thermal cycling and many chemicals including water, fuels, lubricants, acids, among others. As per the UL 94V-0 specification, this system is serviceable over the wide temperature range of -51°C to +90°C. It bonds well to metals, glass, ceramics and many plastics. To optimize its properties, the best cure schedule is overnight at room temperature followed by 2-3 hours at 150-200°F. Its electrical insulation properties are excellent. This compound is color coded for easy mixing; the color of Part A is black and the color of Part B is off white. This formulation is far more user friendly when compared to standard flame resistant epoxy systems. EP21FRNS-2 has wide applicability in the computer, aerospace and related industries.

Product Advantages

  • Convenient mixing: one to one mix ratio by weight
  • Good flow properties; ideal for electronic potting and encapsulation
  • Versatile cure schedules: ambient temperature cures or faster cures at elevated temperatures
  • High bond strength to a wide variety of substrates
  • Superior durability and thermal shock resistance; excellent resistance to fuels and lubricants



Industrial Certifications

UL 94V-0 Flame Resistant




Premixed & Frozen Syringe

EP21FRNS-2 is available is various sizes and units to accommodate customer's needs.

Visual Media

Fire Away!

Featuring a non-halogen filler, Master Bond EP21FRNS-2 passes UL 94V-0 testing for flame retardancy in potting, encapsulation and casting applications.
It produces very low smoke levels and is well suited for the computer, aerospace and related industries. EP21FRSN-2 is a room temperature curing two component epoxy system that resists high temperatures up to 90°C.

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