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03-10-2009, 07:17 PM
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Join Date: Jan 2005
Location: Santa Rosa, CA
Posts: 216
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Polyester vs Epoxy Resin on the FAB?
Hello Everyone,
I'm working on my filtered air box and saw that the plans say to use polyester resin for any of the glass work. I have been using epoxy on every other fiberglass parts so far, so I'm wondering if that will work on the FAB or if I have to use polyester.
Any thoughts?
__________________
Craig Schwartz
RV-8 (Flying!), IO-360B1PC2 (180 hp, 1 P-Mag, 1 Slick Mag), Whirlwind 200RV, AF-3500, G496, Digiflight II, Classic Aero Sportsman Ultraleather Seats
N868RV
Santa Rosa, CA
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03-10-2009, 07:55 PM
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Join Date: Jan 2005
Location: Chandler, AZ
Posts: 2,901
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Epoxy
Hey Craig,
Use epoxy. Clean thoroughly before sanding anything. Scuff with 100 grit before doing any layups.
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Darwin N. Barrie
Chandler AZ
www.JDair.com
RV-7 N717EE-Flying (Sold)
RV-7 N717AZ Flying, in paint
EMS Bell 407,
Eurocopter 350 A-Star Driver
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03-10-2009, 07:57 PM
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Join Date: Jun 2005
Location: Sugar Land, Texas
Posts: 27
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Epoxy sticks best to epoxy. Epoxy sticks well to polyester. Polyester sticks well to polyester. Polyester does not sticks as well to epoxy as epoxy sticks to polyester. You have to rough up "well" the part you are sticking to with either. I hope this helps
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03-10-2009, 08:17 PM
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Join Date: Jan 2005
Location: Santa Rosa, CA
Posts: 216
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Got it.
Thanks guys. I appreciate the quick help.
__________________
Craig Schwartz
RV-8 (Flying!), IO-360B1PC2 (180 hp, 1 P-Mag, 1 Slick Mag), Whirlwind 200RV, AF-3500, G496, Digiflight II, Classic Aero Sportsman Ultraleather Seats
N868RV
Santa Rosa, CA
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03-10-2009, 08:45 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,027
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The part is manufactured with fire retardant polyester resin, which is the reason you are told to continue using polyester resin.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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03-10-2009, 11:38 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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But Scott....
Quote:
Originally Posted by rvbuilder2002
The part is manufactured with fire retardant polyester resin, which is the reason you are told to continue using polyester resin.
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...most of us would use non fire retardant polyester - the normal boat stuff....
So what is the advantage of non fire retardant polyester over epoxy?
Or are we all using the wrong material?
It appears that Aircraft Spruce doesn't even offer fire retardant polyester resin --
http://www.aircraftspruce.com/menus/cm/resin.html
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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03-11-2009, 06:46 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,027
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Quote:
Originally Posted by az_gila
...most of us would use non fire retardant polyester - the normal boat stuff....
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That's good because that is what the instructions recommend.
I wasn't meaning to say that builders should get Fire Retardant resin. I was mentioning that is what they are manufactured with, so for good adhesion properties, polyester resin was recommended. Any glass work that builders generally do on the FAB is a small percentage compared to the entire part, so not using FR resin should not be considered an issue. Besides, anyone that chooses to use epoxy is not using a fire retardant resin either
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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