[rebel-builders] Firewall sealant
Posted: Sun Feb 19, 2012 12:08 pm
Jesse, If I may---A quote from the Cessna R-182 service manual chapter
17-66 Firewall damage: Firewall sheets may be repaired by--lapping over
the old material w/ .016 material---and sealed with Prow-seal No.700
(Coast Pro-Seal Co., chemical division, 2235 Beverly Blvd., Los Angeles,
CA or an equivalent and secured with MS16535- (steel) or MS20613-
(corrosion resistant steel) rivets. Use the same rivets for the heater
box. Most of the other attaching hardware may be installed with
MS20470- rivets.
The speck on 700 is ---withstand temperature of 2,000*f for 5 min.
I have never been involved with an engine compartment fire, but I do
know that I would want all the protection I could have.
Fuel tank sealant is good for only about 200*-300*f. Red RTV is good
for about 500*f. Beechcraft uses a putty type material, kind of like a
strip caulk. This stuff dries rather hard after a few years, but is
supposed to swell up when it gets real hot. I will know more about this
stuff when my order arrives on Tuesday of next week. I need to reseal
the firewall of an F-33-A before I put in the IO-550 conversion----which
is keeping me from working on my Moose! But it means more Moose parts!!
Hope this helps you decide.
Dick Wampach SR-108
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf of
Jesse Jenks
Sent: Saturday, May 19, 2007 8:09 PM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] Firewall sealant
I got some 3M fire barrier sealant with the idea of using it to fill in
the
voids in the firewall where it meets the 4 corner wraps. I used it
between
the mating surfaces of the firewall and side/bottom/corner skins (don't
ask
me why, it just seemed like a good idea at the time) when I riveted them
on,
and discovered that it doesn't stick to metal very well. Now I am
hesitant
to use it as the primary material in the void filling operation. It will
be
exposed to fuel and oil, and aside from it's hopefully
never-to-be-needed
role as a fire stopper, it has the every day role of stopping heat,
fumes,
and anything else nasty from entering the cabin. I am now thinking a
true
sealant material like proseal would be better as the primary fillet
material, with a coat of the Fire Barrier on the engine side.
What have others done here?
Thanks in advance. Jesse
_________________________________________________________________
PC Magazine's 2007 editors' choice for best Web mail-award-winning
Windows
Live Hotmail.
http://imagine-windowslive.com/hotmail/ ... TAGHM_migr
ation_HM_mini_pcmag_0507
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17-66 Firewall damage: Firewall sheets may be repaired by--lapping over
the old material w/ .016 material---and sealed with Prow-seal No.700
(Coast Pro-Seal Co., chemical division, 2235 Beverly Blvd., Los Angeles,
CA or an equivalent and secured with MS16535- (steel) or MS20613-
(corrosion resistant steel) rivets. Use the same rivets for the heater
box. Most of the other attaching hardware may be installed with
MS20470- rivets.
The speck on 700 is ---withstand temperature of 2,000*f for 5 min.
I have never been involved with an engine compartment fire, but I do
know that I would want all the protection I could have.
Fuel tank sealant is good for only about 200*-300*f. Red RTV is good
for about 500*f. Beechcraft uses a putty type material, kind of like a
strip caulk. This stuff dries rather hard after a few years, but is
supposed to swell up when it gets real hot. I will know more about this
stuff when my order arrives on Tuesday of next week. I need to reseal
the firewall of an F-33-A before I put in the IO-550 conversion----which
is keeping me from working on my Moose! But it means more Moose parts!!
Hope this helps you decide.
Dick Wampach SR-108
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf of
Jesse Jenks
Sent: Saturday, May 19, 2007 8:09 PM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] Firewall sealant
I got some 3M fire barrier sealant with the idea of using it to fill in
the
voids in the firewall where it meets the 4 corner wraps. I used it
between
the mating surfaces of the firewall and side/bottom/corner skins (don't
ask
me why, it just seemed like a good idea at the time) when I riveted them
on,
and discovered that it doesn't stick to metal very well. Now I am
hesitant
to use it as the primary material in the void filling operation. It will
be
exposed to fuel and oil, and aside from it's hopefully
never-to-be-needed
role as a fire stopper, it has the every day role of stopping heat,
fumes,
and anything else nasty from entering the cabin. I am now thinking a
true
sealant material like proseal would be better as the primary fillet
material, with a coat of the Fire Barrier on the engine side.
What have others done here?
Thanks in advance. Jesse
_________________________________________________________________
PC Magazine's 2007 editors' choice for best Web mail-award-winning
Windows
Live Hotmail.
http://imagine-windowslive.com/hotmail/ ... TAGHM_migr
ation_HM_mini_pcmag_0507
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