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LarryRosen
Joined: 16 Jan 2006
Posts: 415
Location: Medford, NJ
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 Posted: Fri Feb 06, 2009 8:37 am Post subject: Flamemaster Shelf Life |
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I have some expired Flamemaster. Some expired in 2007 and some in
2008. It has spent most of it life since I have had it in the freezer.
Is it still good? How would I know if it is not good.
Larry Rosen
#356
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Larry Rosen
#40356
N205EN (reserved)
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ricksked(at)embarqmail.co
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| Posted: Fri Feb 06, 2009 8:57 am Post subject: Flamemaster Shelf Life |
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Larry,
Mine was crap after the expiration date...I cured so fast it never made it out of the tube, that was the firewall sealant...the proseal seemed Ok but I only used it on the cabin top and naca vents
Rick S.
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Tim Olson
Joined: 25 Jan 2007
Posts: 2881
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| Posted: Fri Feb 06, 2009 9:19 am Post subject: Flamemaster Shelf Life |
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I've still got some from 2004/5 that I've used on some
items. You may just want to test it and see how
it goes. If you're still doing fuel tanks, maybe
then I'd just buy one fresh can though....and call this
stuff spare.
Tim Olson - RV-10 N104CD - Flying
do not archive
Larry Rosen wrote:
| Quote: |
I have some expired Flamemaster. Some expired in 2007 and some in
2008. It has spent most of it life since I have had it in the freezer.
Is it still good? How would I know if it is not good.
Larry Rosen
#356
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http://www.matronics.com/Navigator?RV10-List |
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Fri Feb 06, 2009 11:14 am Post subject: Flamemaster Shelf Life |
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You mentioned Flamemaster sealant, but I will respond on PPG ProSeal.
Our products at work are tracked for FAA accountability. We are
penalized if caught with expired product in our hands.
The last prepackaged tube of PR-1422B1/2 is in what we call a Semkit
bag. It is hermetically sealed against oxidation of the catalyst. The
package is filled with nitrogen gas to displace oxygen. It was
manufactured in Nov 2008, we received it on November 17th. It formally
expires on August, 2009.
We have a backdoor policy that throws the stuff away (at expiration)and
other mechanics use it in the field for experimental aircraft and those
that the Eco-nazis are not tracking. "All of our sealant is used or
disposed of before the expiration. We have been hit several times by
the FAA. It is $10,000 each occurrence".
I have heard tribal knowledge of refrigeration and sealing it away from
oxygen. I have been told Seal 'a Meal units work great. In metal cans
that is a bit tougher. When expired, the primary sealant dries out,
loses its flow characteristic or the catalyst fails to "light off" the
concoction. B1/2 gives 30 minutes work time. It cures at room temp in
about 24 hours. B 1/4 gives 15 minutes and cures in less than four (we
use it for Line Repairs). The B2 stays workable for 120 minutes and we
have been known to use stuff that has not yet set up 8 hours later for
selected jobs (is used in Heavy Check "C").
When the catalyst goes South, and the final product does not cure. The
applicator (You) get to clean off the expired non cured concoction. At
that point MEK comes into the formulation. This is more information
than RV-10 builders want to read.
The answer: Mix a batch, let it cure, make a judgment call as you are
the manufacturer. The planet will be better for one less batch of
hazmat discarded.
John Cox
#600
do not archive
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