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Old 08-11-2022, 01:41 PM
Sawtooth Sawtooth is offline
Join Date: Sep 2021
Location: Hamilton, MT
Posts: 7
Default West System Alternatives

I know West Systems Epoxy seems to be recommended most often but are there others out there that are just as good? I like to help the little guys compete when I can.
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Old 08-11-2022, 02:15 PM
David Paule David Paule is offline
Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,420

I've been using p/n 01-07924 from Aircraft Spruce. I like it.

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Old 08-11-2022, 02:24 PM
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KenB KenB is offline
Join Date: Sep 2018
Location: Longmont, CO
Posts: 24

I've used System Three and like it. I'm not sure it qualifies, though, as a "little guy".
Longmont, Colorado (KLMO)
RV-9 in process
Pietenpol Air Camper, flying since 2017
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Old 08-11-2022, 02:34 PM
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BillL BillL is offline
Join Date: Sep 2007
Location: Central IL
Posts: 6,736

Lots of good epoxy resins - - different properties though. I use West unless I need something it does not do (properties). I have used some of the following. Not nearly all they offer!!

Resin Systems
EZ poxy
PTMW industries

Warning: Reading selection specifications can make one dizzy.
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Old 08-11-2022, 04:34 PM
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jrock836 jrock836 is offline
Join Date: Nov 2020
Location: Burleson, Texas
Posts: 365

In the fiberglass boat circles Total Boat epoxy is pretty popular, along with West Systems..
2013 RV-12ULS
Fort Worth, TEXAS!

EAA #1409566
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Old 08-11-2022, 04:42 PM
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RV7Guy RV7Guy is offline
Join Date: Jan 2005
Location: Chandler, AZ
Posts: 3,094
Default West Systems

Can't go wrong with West Systems. I also used some High Temp epoxy from Fiberglast when I made the plenum for my plane.
Darwin N. Barrie
Chandler AZ
RV-7 N717AZ Painted and Complete
2021 Outstanding Workmanship Sun N' Fun
2021 Gold Lindy Grand Champion Kit Plane
2022 Copperstate Fly in Grand Champion/Best Metal
2022 Reserve Grand Champion Sun N' Fun
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Old 08-11-2022, 04:42 PM
PilotjohnS PilotjohnS is offline
Join Date: Jan 2016
Location: Southwest
Posts: 2,440
Default Aeropoxy

Aeropoxy 2032 is 25% stronger than West and has a higher Tg, glass transition temp(194F vs 139F). I used it for my windscreen and like it a lotion
John S

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.

Dues paid 2022, worth every penny

RV9A- Status:
98% done, 2% left to go
Structure done (less gear)
Electrical/Panel done
Firewall Forward 95% done less baffles and airbox
Fiberglass 95%
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Old 08-11-2022, 09:07 PM
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RV6_flyer RV6_flyer is offline
Join Date: Jan 2005
Location: NC25
Posts: 3,981
Default Total Boat Epoxy

One of my RV flying / building friends was a composite airplane builder before he discovered RVs.

He recommended Total Boat epoxy to me as equal to but lower price than West Systems Epoxy. My research shows that Total Boat can be mixed with West Systems and is the same strength. Total Boat can be purchased on Amazon or direct from manufacturer and is less money than West Systems.

A kit of Total Boat epoxy comes with pumps for less money than West System without the pumps. West Systems has been in metal containers but Total Boat comes in plastic containers.
Gary A. Sobek
NC25 RV-6
3,500+ hours
Where is N157GS
Building RV-8 S/N: 80012

To most people, the sky is the limit.
To those who love aviation, the sky is home.
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Old 08-11-2022, 10:23 PM
scsmith scsmith is offline
Join Date: Jan 2008
Location: Ashland, OR
Posts: 3,203

We use Jeffco (now Rhino) 1307LV almost exclusively. It is much cheaper than West, and a much better resin system. We normally buy it from ACS. The specs are essentially identical to the European MGS 285 that is widely used for composite aircraft construction in Europe, at a fraction of the cost, and more readily available.

West has let me down enough times that it is banned from my shop. One of its main shortcomings is that it will cold-inhibit. You do a layup, and the shop temp is, lets say, about 60F. Before it cures, the shop temperature may drop to the low-mid 50s F. With West system, you will get a rubbery part. You can then post-cure it at whatever temperature you like, for however long you like, and you will never get a good cross-linked epoxy cure.

I've done layups with Jeffco 1307 down to the high 40s F, and although very slow, it WILL cure, hard. And with a post-cure in the 100F range, will develop full mechanical properties. I know. I've done test coupons.

The only other epoxy resin system we regularly use is for applications where customers seem ****-bent on painting our parts black or dark red, and we need a higher T_g. For those applications, we use a PTM&W system that requires a post-cure to 175F and has a T_g of about 260F. (again verified by test coupons)
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet" Flying since Sept. 2009
Hobbs 700
1/4 share in 1959 C-182B (tow plane)
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Dec 2021

Last edited by scsmith : 08-11-2022 at 10:29 PM.
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Old 08-12-2022, 06:41 AM
lr172 lr172 is offline
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 7,483

I bought a gallon kit of total boat epoxy. It is a west knock off and about half the price. Am told the formulation is identical. Has worked well and seems to perform exactly like west.

N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019

Last edited by lr172 : 08-12-2022 at 06:43 AM.
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