Backhead/firedoor joint

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jlakes85
Posts: 205
Joined: Thu Feb 23, 2012 6:07 am

Backhead/firedoor joint

Post by jlakes85 » Fri Dec 22, 2017 8:04 am

Hi all,

I've determined that my firedoor ring isn't completely flush with the back head and therefore I have a but of an air gap between the the firedoor frame and backhead during mock-up. Are there any hi temp sealers that would work to fill this gap? I thought about ultra copper, but just want to check that it will stand up to this service. Thanks again.

-jlakes85

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Marty_Knox
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Location: Michigan, USA

Re: Backhead/firedoor joint

Post by Marty_Knox » Fri Dec 22, 2017 8:30 am

Furnace cement

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Bill Shields
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Re: Backhead/firedoor joint

Post by Bill Shields » Fri Dec 22, 2017 8:52 am

you can also use woven fiberglass, like we use on furnace doors. Stick it on with high-temp RTV (good for 3000 F)
Once everything is in place (including the door), you can trim the excess off with an Xacto knife
Too many things going on to bother listing them.

jlakes85
Posts: 205
Joined: Thu Feb 23, 2012 6:07 am

Re: Backhead/firedoor joint

Post by jlakes85 » Sat Dec 23, 2017 9:43 am

Sounds good. Would either the RTV adhesive or furnace cement have the required strength to use them completely in lieu of threaded mounting studs?

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Marty_Knox
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Re: Backhead/firedoor joint

Post by Marty_Knox » Sat Dec 23, 2017 10:38 am

NO

jlakes85
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Re: Backhead/firedoor joint

Post by jlakes85 » Sat Dec 23, 2017 10:59 am

Gotcha, I'm glad I asked

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JohnHudak
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Location: Ohio

Re: Backhead/firedoor joint

Post by JohnHudak » Sat Dec 23, 2017 11:05 am

How much of a gap are we talking about here? .005" or 1/8"? At what point would a gap be "too much" Didn't the prototype fire doors have small holes in them?

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