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Gas vs. Epoxy

Old 05-18-2016, 05:49 AM
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Default Gas vs. Epoxy

Will fuel deteriorate cured epoxy resin if used as a joint compound/adhesive?

In the process of building a fuel polishing/transfer system.
Have used all High end components.

After doing some research and taking into consideration the pipes will not be submerged more than 30 minutes at a time, from what I have gathered PVC can be used for a pick and discharge pipe which will be used to insert into the tanks.

Now, since I can't use standard glue for joining the fittings on the ends of the pipes, I will have to rely on something different and the only thing I can think of that's rock hard is epoxy.

What's all of your intelligent thoughts on this?

Will post pics of the build once I fab the sub frame to hold all components in place.

Last edited by Riptied; 05-18-2016 at 09:10 PM.
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Old 05-18-2016, 09:12 AM
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After awhile the gas will leach the plasticizer out of the PVC and it will become very brittle.
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Old 05-18-2016, 09:56 AM
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It's my understanding that the ethanol in E10 gas is what caused the failure of older fiberglass fuel tanks by attacking the resin on the fiberglass and turning it into goop that clogs everything down stream.
So the question is, are the resin used on fiberglass and the resin used in epoxy the same?
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Old 05-18-2016, 10:46 AM
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Originally Posted by KeithS View Post
It's my understanding that the ethanol in E10 gas is what caused the failure of older POLYESTER fiberglass fuel tanks by attacking the POLYESTER resin on the fiberglass and turning it into goop that clogs everything down stream.
So the question is, are the resin used on POLYESTER fiberglass and the resin used in epoxy the same?
You have half the correct information.
Polyester casting resin, like what you can get at Home Depot is susceptible to decay from ethanol. However, Epoxy resin, like West System, is not. Epoxy is good with diesel tanks, too.
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Old 05-18-2016, 11:39 AM
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Old 05-18-2016, 01:26 PM
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Appreciate everybody's comments.

Regardless of what I have read while researching this subject I think I'm going to pour up a small medicine cup puck of the epoxy, let it cure for about 5 days in the sun, weigh it and then submerge it in rec 91 and check it every so often to see if it's starting to deteriorate or if the weight has changed.

Will follow up at a later date.
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Old 05-18-2016, 01:41 PM
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http://www.jamestowndistributors.com...t.do?docId=563






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Old 05-18-2016, 01:47 PM
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Originally Posted by semperfifishing View Post
This and feel free to talk to them, very helpful
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Old 05-18-2016, 09:08 PM
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Have a 1/2 qt. of Permatex Aviation Form-A-Gasket No. 3 Sealant which was used for all other fittings within the system.

The only place I am (maybe after testing) going to use the epoxy was at the end of the pickup tube which will have a Graco SS ball screen.

If the epoxy testing doesn't pan out I'll more than likely just drill a hole through the threaded coupling and pipe to secure with a bolt & nut.
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