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01-20-2018, 07:32 AM
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Join Date: Oct 2005
Location: 08A
Posts: 9,500
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Quote:
Originally Posted by snopercod
You have to be careful choosing a fire barrier caulk. On my Lancair I used the stuff that came with my Firewall 2000 Ceramic Blanket kit - 3M, I think. Over the years, it ate into my engine mounts.
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John, can you identify the sealant?
__________________
Dan Horton
RV-8 SS
Barrett IO-390
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01-20-2018, 03:10 PM
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Join Date: Aug 2016
Location: Asheville, NC
Posts: 2,106
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Quote:
Originally Posted by DanH
John, can you identify the sealant?
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I'm afraid not. I threw the tube out over twenty years ago. Here's what it did to my engine mount, though:
I wire brushed it down to bare metal, determined that the damage was superficial only, primed it with red oxide primer, and top coated it.
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(2020 dues paid)
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01-21-2018, 07:02 AM
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Join Date: Oct 2005
Location: 08A
Posts: 9,500
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Hmmm. I suspect latex sealant, or one of the acid cure silicones, but I'll have my cowl off today for a condition inspection in progress. I'll take a hard look at the FireBarrier 2000, now going on 9 years since installation, in a humid deep south climate.
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Dan Horton
RV-8 SS
Barrett IO-390
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01-21-2018, 08:04 AM
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Join Date: Oct 2007
Location: Sacramento, CA
Posts: 3,351
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Quote:
Originally Posted by DanH
Hmmm. I suspect latex sealant, or one of the acid cure silicones, but I'll have my cowl off today for a condition inspection in progress. I'll take a hard look at the FireBarrier 2000, now going on 9 years since installation, in a humid deep south climate.
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Hi Dan,
Please report back if you see any sign of issues, I just used the same Fire Barrier 2000 to seal/adhere fiberfrax/stainless steel sheet to my firewall. It will not touch the engine mount but still would like to know if it has any corrosive affect on metal.
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Mehrdad
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - Flying
Dues paid
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01-21-2018, 01:35 PM
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Join Date: Nov 2012
Location: Launceston, Tasmania, Australia
Posts: 774
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Hey Meherad,
My heart skipped a beat when I too read these last few posts. I checked the specs on Fire Barrier 2000+ and it is indeed a neutral curing silicone, so non corrosive. Specs, and statement that it is "neutral-cure" may be found below:
https://www.3m.com/3M/en_US/company-...3123941&rt=rud
The only negatives I could find with respect to corrosion were during the curing process. In one of the data sheets available the following statement is made:
"Note: In confined cure conditions, there may be discoloration of brass, copper or other sensitive metals."
http://multimedia.3m.com/mws/media/1...alant-2000.pdf
Apart from that the only other corrosion info on the product I could find was an old thread DanH contributed to on VAF:
http://www.vansairforce.com/communit...t=35016&page=2
Hope this helps you sleep better.
Tom.
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01-21-2018, 09:22 PM
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Join Date: Oct 2005
Location: 08A
Posts: 9,500
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Previously I said
Quote:
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Hmmm. I suspect latex sealant, or one of the acid cure silicones, but I'll have my cowl off today for a condition inspection in progress. I'll take a hard look at the FireBarrier 2000, now going on 9 years since installation, in a humid deep south climate.
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Not the slightest sign of corrosion on anything. Maybe in another 9 years.
__________________
Dan Horton
RV-8 SS
Barrett IO-390
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01-22-2018, 08:41 AM
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Join Date: Oct 2007
Location: Sacramento, CA
Posts: 3,351
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Thank you Tom and Dan for confirming this.
__________________
Mehrdad
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - Flying
Dues paid
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