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Ceengland
Joined: 11 Oct 2020
Posts: 393
Location: MS
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 Posted: Fri Dec 18, 2020 8:44 am Post subject: Has anyone used very high temp silicone FWF? |
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On 12/18/2020 9:25 AM, rparigoris wrote:
That product has been touted by many on various aviation forums as being
intumescent, and I've always assumed that it was. But I just spent about
half an hour prowling the 3M sites and can find no reference to
'intumescent' in their docs. Nor can I find any direct reference to
temperature rating; only the 'implication' of 2000 degree rating in the
name. The docs refer to various ASTM testing methods, which you can read
for about $50 each if you're willing to pay.
On the other hand, this stuff:
https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Fire-Barrier-Sealant-CP-25WB-/?N=5002385+3293123924&rt=rud
does have the magic word in its description, and mentions a 1000 degree
temp rating.
3M™ Fire Barrier Watertight Silicone
3000 WT Sealant
is also listed by 3M as being intumescent.
I've attached a pdf of 3M fire block products. Hope it will make it
through; its 1.5Mbytes.
Charlie
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| Description: |
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Download |
| Filename: |
3M-Fire-Barrier-2000-Silicone-Sealant-Summary-Brochure-1608784.pdf |
| Filesize: |
1.52 MB |
| Downloaded: |
157 Time(s) |
_________________
Charlie |
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rparigoris
Joined: 24 Nov 2009
Posts: 804
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| Posted: Fri Dec 18, 2020 11:41 am Post subject: Re: Has anyone used very high temp silicone FWF? |
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Hi Charlie
That's the stuff I've been using, I called 3M because it's hard to figure out all details from documentation, the maximum service temperature is 302F, it has a fire rating of 4 hours. 4 hours means nothing to me so I had representative try to explain. I asked if that's 4 hours with a propane torch on top of it, or an oxyacetylene torch on top of it or the neighbor burning garbage 2 miles away. The best I could get is it isn't meant for an aeroplane, so I posed how about a car, how would it hold up to a gas or oil fire on a car. Well their product isn't meant for a car either. It's meant for sealing to sheet rock and then it will hold up for 4 hours:
• Firestop tested up to 4 hours in
accordance with ASTM E 814 (UL
1479) & CAN/ULC S115
• Fire Resistance tested for construction
joint systems in accordance with
ASTM E 1966 (UL 2079)
• Class 25 sealant, per ASTM C
That's all I got, doesn't mean much to me. I have some Red Dow 736 meant for 500 and short 600F and tested it with a torch on it along with Fire Barrier 2000, didn't see much difference, perhaps the gray was slightly slightly better but they both go away. Ron P.
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Ceengland
Joined: 11 Oct 2020
Posts: 393
Location: MS
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| Posted: Fri Dec 18, 2020 2:12 pm Post subject: Has anyone used very high temp silicone FWF? |
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On 12/18/2020 1:41 PM, rparigoris wrote:
| Quote: |
Hi Charlie
That's the stuff I've been using, I called 3M because it's hard to figure out all details from documentation, the maximum service temperature is 302F, it has a fire rating of 4 hours. 4 hours means nothing to me so I had representative try to explain. I asked if that's 4 hours with a propane torch on top of it, and oxyaceletene torch on top of it or the neighbor burning garbage 2 miles away. The best I could get is it isn't meant for an aeroplane, so I posed how about a car, how would it hold up to a gas or oil fire on a car. Well their product isn't meant for a car either. It's meant for sealing to sheet rock and then it will hold up for 4 hours:
• Firestop tested up to 4 hours in
accordance with ASTM E 814 (UL
1479) & CAN/ULC S115
• Fire Resistance tested for construction
joint systems in accordance with
ASTM E 1966 (UL 2079)
• Class 25 sealant, per ASTM C
That's all I got, doesn't mean much to me. I have some Red Dow 736 meant for 500 and short 600F and tested it with a torch on it along with Fire Barrier 2000, didn't see much difference, perhaps the gray was slightly slightly better but they both go away. Ron P.
Which one? It seems there are multiple threads going, and some of us are
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using email (I am, anyway) and others are using the web based list, so I
don't know which product you're talking about. The F-B-2000? If so, it
would seem that you're probably right, since they're so vague with info.
They do claim 1000F+ for the CP 25 WP+ intumescent caulk. Spec sheet
attached, showing that the intumescent action happens at 1000 degrees F.
For simple seam sealing, if we're realistic, just about anything would
be fine, like Ernest said. The latex based intumescent stuff (CP25WP+)
is much cheaper, and ideal for filling empty space around wires, etc in
holes, but even that is probably overkill if you use the firesleeve/hose
clamp method Bob linked.
Charlie
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| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
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| Description: |
|
Download |
| Filename: |
3M-Fire-Barrier-CP-25WB-Product-Data-1608758.pdf |
| Filesize: |
188.96 KB |
| Downloaded: |
200 Time(s) |
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