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Old 10-10-2017, 02:53 PM
Reflex Reflex is offline
Join Date: Jan 2015
Location: Baldwin City, Kansas
Posts: 70
Default Proseal Question

I've got a pretty simple question on Proseal. It know has a limited shelf life. How do I tell if it's gone bad?


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Old 10-10-2017, 03:12 PM
TX7A TX7A is offline
Join Date: Feb 2005
Location: Abilene, TX
Posts: 660


I have kept proseal in my refrigerator at the hangar for several years & used it for various things "except" anything that has to do with fuel tanks. It seems to cure just fine. I did have a leaking rivet in a fuel tank soon after my first flight. I bought a small package of fresh proseal for that repair. I just felt that it was best not to use the old stuff.

I'm not sure I can answer your question, but if it were me, I wouldn't use it for fuel tanks much after the expiration date. YMMV
Sam Evans
RV7-A O-360 C/S
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Old 10-10-2017, 03:18 PM
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Raymo Raymo is offline
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 1,510

Originally Posted by Reflex View Post
I've got a pretty simple question on Proseal. It know has a limited shelf life. How do I tell if it's gone bad?


It will smell good

Joking aside, it will not fully cure.
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Old 10-10-2017, 03:51 PM
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wirejock wirejock is offline
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 2,821
Default Smell

Originally Posted by Raymo View Post
It will smell good ...
No joke. I must have sniffed too much because I think it smells good!
Larry Larson
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Old 10-10-2017, 05:34 PM
Zero4Zulu Zero4Zulu is offline
Join Date: Nov 2008
Location: Scio,Oregon
Posts: 203

I just opened my oldest can and it was really stiff. Could not mix it well enough to use for anything. My other old can (couple years old) seamed just fine and mixed well and is curing fine. Not on a fuel tank..
Steve S.
Rebuilding RV6A
Scio, OR
EAA Ch. 292
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