Firewall gap sealant alternatives?

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Thermos
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Firewall gap sealant alternatives?

Post by Thermos »

Is anybody using something other than the CS-1900 stuff that Vans sells? From what I've seen, it's pretty goopy and difficult to use. The guys who sell stainless steel versions of Vans' heater boxes sell this stuff called Biotherm 100...

http://www.planeinnovations.com/firewallkits.html

It's silicon-based and the company claims that it's easier to apply and withstands higher temperature than RTV high temp stuff by Permatex.

Has anybody tried this stuff, or do you have something else you like?

Dave
Last edited by Thermos on Sat Apr 07, 2012 7:35 am, edited 1 time in total.
Dave Setser
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bullojm1
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Post by bullojm1 »

Dave,

I used the CS-1900 for my RV. I wouldn't say it's difficult to use, it just mixes differently than say epoxy or proseal. The BioTherm product seems to have the same flash point as CS-1900 of 2,000 degrees F, so it should be a comparable product. Buy some and report back!
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captain_john
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Post by captain_john »

Dave, I have used both.

I used the CS-1300 on the firewall and the biotherm on all the penetrations (did I just type that?).

Yah, soooo the CS-1300 isn't goopy. It is actually quite the opposite. You are working a bolus and trying to get the oxygenator into the mix. Not too hard to work with really.

The biotherm is WAAAAY easier to work with. It is single part and seems to do the trick quite well. I have not done any real flame tests, of course.

I wouldn't hesitate to use either for the firewall edges but for ease of use, biotherm gets the nod!

Does this help?

:) CJ
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Thermos
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Post by Thermos »

Thanks guys...

John, I didn't know you were using the Biotherm. If at least two of us use it, it must be ok, right? It looks like the stuff I'll use for the firewall penetrations and the oil filter cutout.

Dave
Dave Setser
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Post by captain_john »

Dave, if you use Biotherm and it fails... we will fall out of the sky together!

I will be in good company!

Truth be told, I would say that it would probably be just fine for sealing the skins to the firewall.

Give it a whirl!!!

:) CJ
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bruceh
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Post by bruceh »

I bought a tube of this 3M fire barrier 2000+ to use.
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