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Old 12-08-2018, 11:50 AM
Stockmanreef Stockmanreef is offline
Join Date: Nov 2012
Location: Midland, mi
Posts: 805
Default SS Foil for Firewall Insulation

Is 0.002 stainless steel foil OK for covering insulation on the firewall or should I use something thicker?

It seems that 0.002 is easy to come by, but I can't find a good source for .003. Or is thicker better?

Can someone direct me to a good source?

Ken Stockman
Midland, MI
EAA Chapter 1093 member

RV-14a (serial number 140073)
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Old 12-08-2018, 12:04 PM
rocketman1988 rocketman1988 is offline
Join Date: Jun 2010
Location: Sunman, IN
Posts: 1,975
Default mcmaster

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Old 12-08-2018, 02:25 PM
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DakotaHawk DakotaHawk is offline
Join Date: Oct 2008
Location: Arlington, WA
Posts: 798

I'm coming up on the Firewall chapters for my RV-14 build. Is there a website or youtube video that gives a good explanation of the process of insulating and protecting the firewall?

"I didn't become an expert at any subject until YouTube came along!"
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RV-7 N957RV (First Flight on Dec 18, 2009)
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Old 12-08-2018, 03:03 PM
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Raymo Raymo is offline
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 2,051

Dan H and others have lots of info and photos linked to VAF. The local search feature is a bit complicated, IMO, but you can use other search engines with the following technique.

site: firewall insulation

Here is the "how to" for the non-computer nerds out there
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Old 12-08-2018, 03:12 PM
David Paule David Paule is offline
Join Date: Dec 2009
Location: Boulder, CO
Posts: 4,097

I'll be using .005 titanium foil, from

I think it's slightly easier on the hands. Due to the thickness, it'll be a bit heavier, just over half an ounce per square foot.

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Old 12-08-2018, 07:21 PM
Dorfie Dorfie is offline
Join Date: Aug 2009
Location: Lexington, KY
Posts: 446

I used 0.002 SS foil on my firewall. Came out well and I am happy with the result.
You can cut it with scissors as well as a blade.
It is extremely sharp and will cut you if not careful.
You cannot drill a hole using a standard drill. It rips. Larger holes, 1/4inch and up you can cut with a knife using the hole in firewall edges as guide. Smaller holes like 1/8 inch I cut a cross into hole and then used a tapered grinding stone in a Dremel against firewall hole edges.
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Old 12-08-2018, 10:04 PM
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Checkmate Checkmate is offline
Join Date: Dec 2014
Location: Western Michigan
Posts: 33
Default .005 SS

I used .005 SS Shim Stock. No wrinkled tinfoil look like the thinner stuff but some oil canning is to be expected around the areas where you attach items over it. Also a hydraulic punch works great for making nice clean round holes.
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Old 12-08-2018, 10:10 PM
kaweeka kaweeka is offline
Join Date: May 2011
Location: Roseville
Posts: 334

Pure firewall porn! That looks amazing!!
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Roseville, Ca
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