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rparigoris
Joined: 24 Nov 2009
Posts: 796
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 Posted: Thu Dec 17, 2020 5:47 pm Post subject: Has anyone used very high temp silicone FWF? |
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Hi Group
Permatex makes a Gray Very High Temp Silicone #27036 good for up to 700F and a Red Very High Temp Silicone #27038 good for up to 750F. Does anyone have any experience using these FWF? Thx. Ron P.
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Last edited by rparigoris on Thu Dec 17, 2020 8:22 pm; edited 1 time in total |
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cluros(at)gmail.com
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| Posted: Thu Dec 17, 2020 6:04 pm Post subject: Has anyone used very high temp silicone FWF? |
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Never heard of Permatatex but FWF I use Permatex 27038.
On Thu, Dec 17, 2020, 17:56 rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote:
| Quote: | --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>
Hi Group
Permatatex makes a Gray Very High Temp Silicone #27036 good for up to 700F and a Red Very High Temp Silicone #27038 good for up to 750F. Does anyone have any experience using these FWF? Thx. Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499704#499704
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art(at)zemon.name
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| Posted: Thu Dec 17, 2020 6:28 pm Post subject: Has anyone used very high temp silicone FWF? |
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Ron,
What are you using it for? What FWF gets that hot and needs silicone?
  -- Art Z.
On Thu, Dec 17, 2020 at 8:10 PM rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote:
| Quote: | --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>
Hi Group
Permatatex makes a Gray Very High Temp Silicone #27036 good for up to 700F and a Red Very High Temp Silicone #27038 good for up to 750F. Does anyone have any experience using these FWF? Thx. Ron P. |
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https://CheerfulCurmudgeon.com/Each of us is worth only what we are willing to give away to others. -- Lynn Schusterman
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Ceengland
Joined: 11 Oct 2020
Posts: 391
Location: MS
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| Posted: Thu Dec 17, 2020 6:59 pm Post subject: Has anyone used very high temp silicone FWF? |
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My question, as well. I used silicone bath caulk to reseal baffles to the heads/cylinders on an RV4 Lyc 5 or 6 years ago, and it was still holding up well when I sold the plane last year.
A friend on the rotary engine list used it instead of a metal gasket to seal the exhaust manifold to the block on a racing rotary.
Charlie
On 12/17/2020 8:23 PM, Art Zemon wrote:
| Quote: | Ron,
What are you using it for? What FWF gets that hot and needs silicone?
  -- Art Z.
On Thu, Dec 17, 2020 at 8:10 PM rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote:
| Quote: | --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>
Hi Group
Permatatex makes a Gray Very High Temp Silicone #27036 good for up to 700F and a Red Very High Temp Silicone #27038 good for up to 750F. Does anyone have any experience using these FWF? Thx. Ron P. |
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https://CheerfulCurmudgeon.com/ Each of us is worth only what we are willing to give away to others. -- Lynn Schusterman
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rparigoris
Joined: 24 Nov 2009
Posts: 796
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| Posted: Thu Dec 17, 2020 8:22 pm Post subject: Re: Has anyone used very high temp silicone FWF? |
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Hi Group
I use at the moment either Red High Temp from ACS Silicone or Gray Fire-barrier 2000. I figured if and when a fire were to occur having a slightly higher temperature range may be an OK thing. I need to order some more Silicone now. Not quite sure how to compare temperature range of Fire-barrier, can't quite find similar specs.
Ron P.
Permatex makes a Gray Very High Temp Silicone #27036 good for up to 700F and a Red Very High Temp Silicone #27038 good for up to 750F. Does anyone have any experience using these FWF? Thx. Ron P.[/quote]
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rparigoris
Joined: 24 Nov 2009
Posts: 796
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| Posted: Thu Dec 17, 2020 8:41 pm Post subject: Re: Has anyone used very high temp silicone FWF? |
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Hi Group
I didn't answer question, I'm using Silicone to seal holes in Firewall. I'm using Silicone Grommets with thin SS shields and Aluminium collets and supplementing with Silicone. I made a huge pass through that after I fill with wires I will fill with Silicone:
https://1drv.ms/u/s!Ah1S270Nwg9V3ShTVJz3u8ZMmo2t?e=ivjch0
Ron P.
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Ceengland
Joined: 11 Oct 2020
Posts: 391
Location: MS
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| Posted: Thu Dec 17, 2020 9:15 pm Post subject: Has anyone used very high temp silicone FWF? |
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For actual fireproofing, better choice is intumescent caulk. More expensive, but swells with heat to close space left by melting wite, etc, and is good to around 2k degrees.
Sent from BlueMail
On Dec 17, 2020, at 10:58 PM, rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote: | Quote: | | Quote: | | --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com>Hi GroupI didn't answer question, I'm using Silicone to seal holes in Firewall. I'm using Silicone Grommets with thin SS shields and Aluminium collets and supplementing with Silicone. I made a huge pass through that after I fill with wires I will fill with Silicone:[url=https://1drv.ms/u/s!Ah1S270Nwg9V3ShTVJz3u8ZMmo2t?e=ivjch0]https://1drv.ms/u/s!Ah1S270Nwg9V3ShTVJz3u8ZMmo2t?e=ivjch0[/url]Ron P.Read this topic online here:http://forums.matronics.com/viewtopic.php?p=499710#499710http://wiki.matronics.com[/url]http://www.matronics.com/contribution |
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cluros(at)gmail.com
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| Posted: Thu Dec 17, 2020 9:31 pm Post subject: Has anyone used very high temp silicone FWF? |
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Wow Charlie, neat stuff.
On Thu, Dec 17, 2020 at 9:21 PM Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:
| Quote: | For actual fireproofing, better choice is intumescent caulk. More expensive, but swells with heat to close space left by melting wite, etc, and is good to around 2k degrees.
Sent from BlueMail
On Dec 17, 2020, at 10:58 PM, rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote:
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rparigoris
Joined: 24 Nov 2009
Posts: 796
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| Posted: Thu Dec 17, 2020 9:47 pm Post subject: Re: Has anyone used very high temp silicone FWF? |
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Hi Charlie
Thank you for reply. Can you recommend a specific caulk and perhaps where to buy it? Thx. Ron P.
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Foghorn
Joined: 22 Jun 2020
Posts: 3
Location: Virginia Beach
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| Posted: Fri Dec 18, 2020 3:36 am Post subject: Has anyone used very high temp silicone FWF? |
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I’m using fire barrier 2000 by 3M on my RV8 project. https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Fire-Barrier-Silicone-Sealant-2000-/?N=5002385+3293123941&rt=rud
Here is a good discussion on fire wall protection. https://vansairforce.net/community/showthread.php?t=47587&highlight=Fire+barrier+2000
Jeff Parker
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| Quote: | On Dec 17, 2020, at 23:58, rparigoris <rparigor(at)hotmail.com> wrote:
--> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com>
Hi Group
I didn't answer question, I'm using Silicone to seal holes in Firewall. I'm using Silicone Grommets with thin SS shields and Aluminium collets and supplementing with Silicone. I made a huge pass through that after I fill with wires I will fill with Silicone:
https://1drv.ms/u/s!Ah1S270Nwg9V3ShTVJz3u8ZMmo2t?e=ivjch0
Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499710#499710
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Steve Kelly
Joined: 08 Jul 2016
Posts: 18
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| Posted: Fri Dec 18, 2020 3:59 am Post subject: Has anyone used very high temp silicone FWF? |
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Try google for Fire Barrier 2000. Like that it comes in grey. Steve
On Fri, Dec 18, 2020 at 6:41 AM Jeff Parker <foghorn757(at)gmail.com (foghorn757(at)gmail.com)> wrote:
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art(at)zemon.name
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| Posted: Fri Dec 18, 2020 4:23 am Post subject: Has anyone used very high temp silicone FWF? |
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I used 3M Red Fire Barrier Sealant Caulk. Available in the aviation aisle of your local hardware store such as
https://www.homedepot.com/p/3M-10-1-fl-oz-Red-Fire-Barrier-Sealant-Caulk-CP-25WB-Plus-CP25WB-10/100166701
Cheers,
  -- Art Z.
| Quote: |
On Thu, Dec 17, 2020 at 9:21 PM Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:
| Quote: | For actual fireproofing, better choice is intumescent caulk. More expensive, but swells with heat to close space left by melting wite, etc, and is good to around 2k degrees.
Sent from BlueMail
On Dec 17, 2020, at 10:58 PM, rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote: | Quote: | | Quote: | | --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>Hi GroupI didn't answer question, I'm using Silicone to seal holes in Firewall. I'm using Silicone Grommets with thin SS shields and Aluminium collets and supplementing with Silicone. I made a huge pass through that after I fill with wires I will fill with Silicone:[url=https://1drv.ms/u/s!Ah1S270Nwg9V3ShTVJz3u8ZMmo2t?e=ivjch0]https://1drv.ms/u/s!Ah1S270Nwg9V3ShTVJz3u8ZMmo2t?e=ivjch0[/url]Ron P. |
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https://CheerfulCurmudgeon.com/Each of us is worth only what we are willing to give away to others. -- Lynn Schusterman
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Ceengland
Joined: 11 Oct 2020
Posts: 391
Location: MS
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| Posted: Fri Dec 18, 2020 6:57 am Post subject: Has anyone used very high temp silicone FWF? |
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On Thu, Dec 17, 2020 at 11:57 PM rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote:
| Quote: | --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>
Hi Charlie
Thank you for reply. Can you recommend a specific caulk and perhaps where to buy it? Thx. Ron P. |
You've probably seen the other replies; 3M makes two kinds I've used. The red stuff is readily available at big box stores; it's latex based. Has a kinda gritty texture, but the red color might be its biggest drawback. The gray stuff is silicone based and has been a bit harder to find, but IIRC, Aircraft Spruce stocks it. Be aware that the gray is 'better', but more expensive and being silicone, I found it impossible to get more than a couple of closely spaced uses out of that expensive caulk tube before the entire tube cured into a big fireproof cylinder. Playing with 'the google' this morning brought up some other options that might be better/easier to use for our purposes. If you can find it in 'toothpaste tube' size, it'll likely be more than enough for one project. I had to buy gun sized tubes, and 95%+ cured in the tube and was wasted.
One thing to think about is that you're never really finished with a homebuilt. If you caulk the passthrough full, it'll be a real nightmare when (not if) you need to make changes. My plan for my passthroughs is to squirt out 1/4"-3/8" dia 'sticks' of the caulk onto a plastic sheet and let them cure, then stuff the empty spaces in the pass-through with them. Actual sealing will be with firesleeve over the stub of the passthrough, extending a bit onto the wire bundle, and held in place with stainless hose clamps, as has been described here and elsewhere. YMMV, etc. 
Charlie
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rparigoris
Joined: 24 Nov 2009
Posts: 796
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| Posted: Fri Dec 18, 2020 7:25 am Post subject: Re: Has anyone used very high temp silicone FWF? |
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Hi Charlie Is this the gray stuff you are talking about from ACS?:
https://www.aircraftspruce.com/catalog/appages/firewall2000caulk.php?clickkey=18880
Does it expand as you were talking about? To compare it with the Permatex products that have a 750 and 700F temperature rating, what might the temperature rating of the Firebarrier 2000 be? Thx. Ron
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johnbright
Joined: 14 Dec 2011
Posts: 166
Location: Newport News, VA
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| Posted: Fri Dec 18, 2020 11:45 am Post subject: Re: Has anyone used very high temp silicone FWF? |
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Posts 38 thru 42 this VAF thread "Firewall sealant and Fire Safety" could be interesting:
https://vansairforce.net/community/showthread.php?t=72087
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