3M™ Interam™ Endothermic Mat E-5A-4

Product Description:

When properly installed, 3M™ Interam™ Endothermic Mat E-5A-4 provides a uniform covering that, when exposed to high temperatures, releases chemically bound water to cool the outer surfaces of the wrap material and significantly retard heat transfer. Helps protect structural steel, critical electrical and communication systems, fuel oil piping, and large membrane penetrations in walls. 3M™ Interam™ Endothermic Mat E-5A-4 is non-flame supporting with low-smoke evolution. The mat is flexible which aids in installation and allows it to more easily be applied on complex shapes and around corners.


  • Provides up to 4 hour fire protection for structural steel applications1 in
  • accordance with ASTM E119
  • Provides up to 3 hour fire protection for electrical circuit applications1,2 in
  • accordance with ASTM E1725 and UL practice 1724
  • Provides up to 2 hour protection for fuel-oil piping in accordance with UL 14891
  • Provides up to 2 hour equal F-rating and T-Rating in large membrane
  • penetrations of rated wall assemblies1
  • Provides protection against large hydrocarbon pool fires in accordance with
  • ASTM E1529 (UL 1709)1
  • Provides protection to structural, vessel, and electrical systems from the ISO
  • 22899-1 jet fire exposure
  • Chemically-bound water helps cool protective item(s) in the event of a fire
  • Suitable for indoor or outdoor installations3
  • Non-flame supporting and low-smoke evolution per ASTM E84
  • Flexible – can be installed on complex shapes and around corners
  • Easy-to-cut for various shapes and sizes
  • Doesn’t contribute to corrosion of steel or other metals
  • For use in new or retrofit applications
  • Easy-to-clean


3M™ Interam Endothermic Mat E-5A-4 is a flexible and space-saving wrap system that protects against fire spread and smoke contamination in a wide range of new or retrofit applications requiring full envelope protection, including: structural steel, electrical circuitry (e.g. raceways, cables, cable trays, junction boxes, conduits, distributed antenna systems, fire pumps), steam lines, fuel oil pipe, and membrane penetrations (e.g. spaces containing electrical panels, elevator call boxes, safe deposit boxes, medical gas boxes).

Code Compliance:

  • ASTM (UL, ULC) and NBN/ISO Standard Test Methods:
  • ASTM E 84 (UL 723) Surface Burning Characteristics of Building Materials
  • ASTM E 119 (UL 263) Fire Tests of Building Construction and Materials
  • ASTM E 1529 (UL 1709) Determining Effects of Large Hydrocarbon Pool Fires on Structural Members and Assemblies
  • ASTM E 1725 (UL 1724) Fire Tests of Fire-Resistive Barrier Systems for Electrical System Components
  • ASTM E 814 (UL 1479) Standard Test Method for Fire Tests of Penetration Firestop Systems
  • CAN/ULC-S115 Standard Method of Fire Tests of Firestop Systems

For more information involving installation techniques and material data sheets, please follow the attached manufacture link https://multimedia.3m.com/mws/media/201500O/3m-interam-endothermic-mat-e-5a-4-technical-data-sheet.pdf