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-   -   FIREPROOF SEALANT (https://vansairforce.net/community/showthread.php?t=157037)

DanH 01-20-2018 07:32 AM

Quote:

Originally Posted by snopercod (Post 1233599)
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.

John, can you identify the sealant?

snopercod 01-20-2018 03:10 PM

Quote:

Originally Posted by DanH (Post 1233613)
John, can you identify the sealant?

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.

DanH 01-21-2018 07:02 AM

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.

Bavafa 01-21-2018 08:04 AM

Quote:

Originally Posted by DanH (Post 1233787)
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.

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.

tgmillso 01-21-2018 01:35 PM

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.

DanH 01-21-2018 09:22 PM

Previously I said

Quote:

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.
Not the slightest sign of corrosion on anything. Maybe in another 9 years.

Bavafa 01-22-2018 08:41 AM

Thank you Tom and Dan for confirming this.


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