FIBERFRAX 970F 1/16"X24"

Part# 05-02678
MFR Model# 733505200
DescriptionPart No.
FIBERFRAX 970F 1/16" x 24"
Sold by the Foot


A new material made from washed ceramic fibers with binders added to form a lightweight, flexible asbestos-free insulation. Withstands temperatures to 2300 F. Excellent for aircraft firewalls. Available in 24" wide. Sold by the foot.
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Item worked as advertised and was easy to install

James G Verified Purchase

FIBERFRAX 970F 1/16"X24"

April 1, 2024

Working on an auto ejection of bat cells for ballistic chute weight reduction and IN HOUSE Aircraft recovery w/supplies... FUN!

Steven H
November 8, 2020

Great Product, Fantastic customer service as always.

Tim M
March 13, 2020

Perfect product for what I had to used for.

April 27, 2019

Exactly what I needed for furnace heat exchanger reassembly.

John J
November 12, 2018

The thermal conductivity is specified as 0.58 BTU/in/hr/sf/F at 1000F. It is listed as 10 PCF density. I couldn’t tell you what the thermal conductivity is at other densities, but that’s the value I found digging. I use this stuff and other related stuff on a 3D printer that I use with polycarbonate filament. Roughly speaking that’s 5600 BTU/hr per square foot with 1/8” thick with a 1350F EGT and 150F ambient. One way to deal with the fragility is to cut curved panels designed to follow the contours of pipes with bends, meeting with other pieces and wrap two or more non overlapping layers with scraps of copper wire until you’re ready cover it and lace it with stainless wire or whatever you were thinking. It’s good to higher temperatures than your exhaust will ever see (melts at 2150 I think).

September 28, 2018

Cannot check the technicall properties, however, its easy to cutt with scissor and I bonded with 3m fire barrier. Worked great for my needs at the firewall. Searched on the web and call the factory to know which side, but its only part of the manufacturing process, so any side is the same. I used the cloth style on view.

January 9, 2018

This is a great material for heat proofing a cowl that is close to the exhaust system. I put some on a Super Decathlon and a PA28R-201. No worries about the paint bubbling again. I used 3M 1300L Scotchgrip to attach the Fiberfrax material then spray painted it silver and sealed the edges with silicone sealant. The paint helps reflect the radiant heat and keeps the material from absorbing oil or fuel. Try it, you'll like it.
September 15, 2014

Application is for insulation on an engine cowl. This material is essentially a fiber mat with no reinforcement. You can’t bond this to fiberglass or aluminum foil as the mat simply falls off. I’ll be using a woven insulation fabric blanket supplied with an aluminum foil facing.

Bt D
February 15, 2021

I didnt test thiis for fire resistance so I cannot rate that aspect of Fiberfrax. However, Im writing this to advise potential buyers of two characteristics. Fiberfrax will tear easier than a sheet of paper and wont tolerate working around on into tight spaces. Secondly the patterns are different from one side to the other. This is only a problem when trying to efficienly utilize the material. Because ACS fails to provide a detailed description of most of their products the only way one would know such things is to waste $50 such as I did or hope someone has provided details in a review.

Michael N
June 7, 2017


Please note, Aircraft Spruce Canada'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 Canada 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: What is the weight per square foot of the Fiberfrax material?

Per supplier: P/N# 05-02678 is .051 to .0623 lbs/sq ft. P/N# 05-02679 is .105 to .140 lbs/sq ft.

Q: If planing to use on an engine cowling under foil sheet, what adhesive would you recommend to bond to painted cowling surface. Regular Pliobond 20 is not available in California.

You could use PLIOBOND 25 LV, it is CA compliant.

Q: Can this be used on the backside of the firewall to reduce heat transfer to inside of the fuselage?

Yes, that is one of its intended uses.

Q: Is the price for Fiberfrax Firewall Heat Barrier in LF or SF?

This material is 24 inches wide and sold by the linear foot(LF).

Q: Can fiberfrax be painted?

Yes the 970 F Paper can be painted.

Q: Is this FAA approved for certified aircraft?

We do not have FAA certs for this product.

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