Firewall 2000 Ceramic Blanket - 24 Inch Width

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Part# 05-00948


This blanket has been known to be flexible enough to cover compound curves. The heat side of the blanket is covered with stainless steel, the other side is aluminum It is easy to rivet or can be glued into position. Sold by the running foot. Temp. range up to 1000F. 24 inch wide.

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 components for up to four hours, critical electrical components for up to three hours and wall opening membranes for up to two hours. Applied to the back and sides of metallic utility boxes, this product helps achieve an equal F-Rating and T-Rating in membrane penetrations of rated wall assemblies. 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.

Note: There is a stainless steel sheet glued on to one side for extra protection. Tech Data Sheet does not include any info on this extra steel sheet.
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WARNING: Cancer and Reproductive Harm -


  • Provides up to 4 hour fire protection for structural steel applications in accordance with ASTM E 119
  • Provides up to 3 hour fire protection for electrical circuit applications in accordance with ASTM E 1725
  • Provides protection against large hydrocarbon pool fires in accordance with ASTM E 1529 (UL 1709)
  • Chemically-bound water helps cool protective item(s) in the event of a fire
  • Non-flame supporting
  • Low-smoke evolution
  • Flexible can be installed on complex shapes and around corners
  • Easy-to-cut for various shapes and sizes
  • Non-corrosive
  • For use in new or retrofit applications
  • Easy-to-clean


Color: Silver exterior, white interior

Mat Lamination: 3 mil. aluminum/scrim

Mat Thickness: 0.408 in. (10.3 mm)

Weight/Unit Area: 1.83 lbs/ft2 (8.93 kg/m2)

Surface Burning (ASTM E 84): Flame Spread 0.7, Smoke Development 0 Fuel Contribution 0

Thermal Conductivity:

0.087 BTU/ft-hr F @ 200F (0.151 W/m C @ 93C)

0.101 BTU/ft-hr F @ 350 F (0.175 W/m C @ 177 C)

0.058 BTU/ft-hr F @ 600 F (0.100 W/m C @ 316 C)

0.068 BTU/ft-hr F @ 750 F (0.118 W/m C @ 399 C)

0.081 BTU/ft-hr F @ 900 F (0.140 W/m C @ 482 C)

Tensile Strength (with aluminum foil): 110 psi (758 KPa)


  • Tech Data Sheet (PDF)
  • Note: There is a stainless steel sheet glued on to one side for extra protection. Tech Data Sheet does not include any info on this extra steel sheet.
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Customer Service Manager went the distance to resolve the previous issues with crumpled & partial missing stainless steel covering on the 3M firewall composite material. She is to be commended for her professional and courteous approach to your customers. Pilots and homebuilders can source their materials & parts from many options... but this kind and considerate approach is what keeps us coming back to Aircraft Spruce & Specialty.

Jay W
June 7, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Do you have the Tech Data Sheet available for the Firewall 2000 Ceramic Blanket?

Yes, we have added the Tech Data Sheet to the "Documents" tab of this web page. It is a PDF and available for download there.

Q: Is the Firewall 2000 ceramic blanket FAA approved for certified aircraft?

This material is not FAA approved. It meets commercial specs but has not been tested to an FAR specification. Please review the Specifications and Documents tabs on this web page.

Q: How wide is the firewall 2000 ceramic blanket?

This material is 24 inches wide.

Q: what is the length of the blanket?

This is priced and sold by the foot.

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