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Old 01-22-2008, 10:39 AM
Dust's Avatar
Dust Dust is offline
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Join Date: Apr 2004
Location: Troy, Michigan
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Default Which epoxy

well, i been using mgs for the entire build and will use up what i have but if i need more than the gallon and half that i have - i'll switch to gougen bros pro set.
unlike the west system - it has a good TG/post cure properties and it is made locally - right here in michigan.

the west system has no post cure properties - 129F is what you get no matter the post cure temp, to me not acceptable
Enjoy the build,njut av byggandet, godere il costruire, nyd bygningen, geniesse den Bau, apolafse tin kataskevi, disfrute la construcción, curta a construção, Pidä hauskaa rakentamisen parissa, bouw lekker,uživaj grade?inaslajdaites postroikoi, geniet die bou

maker of wood, fiberglass, foam dust, metal bits and one day a Cozy will pop out and swiftly whisk me from meeting old friends and family to adventures throughout the world
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Old 01-22-2008, 10:58 PM
ZG4Me ZG4Me is offline
Join Date: Sep 2006
Location: Colorado
Posts: 185
Default Re: Which epoxy

Funny you should mention

I got on board during the MGS shipping mess of late. Not wanting to deal with the shipping crapola on a key ingredient in our planes, I opted for Pro-Set as my resin of choice. Made by Gougon (sp?) Bros, parent company to both Proset and West. West seems to be consumer oriented, Pro-Set to the industrial "I know what I'm doing" users.

No hard data on post cure for West, though I've read 'elevated temps do help', or some such, but no hard figures.

Pro-Set has close physicals to the approved epoxies, though I'm reading mfg's sheets. Might be a bit optimistic, might not. TG is lower too (see optimistic, or maybe CYA), but it's on the approved list.

I like it 'cuz it's local and I heard a company in Mojave uses it. I can always use MGS if it comes to it. Pro-set wets out better than anything I've ever used, though cure times are pretty long. A fast hardener is made (226) that can be blended with the slow, but Wicks and ACS don't carry it. Pro-Set is also on the upper end of the $ scale

Rick Hall; MK-IV plans #1477;
Build status: 3 4 5 6 7
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Old 01-23-2008, 09:33 AM
neverquit's Avatar
neverquit neverquit is offline
Join Date: Sep 2004
Location: Lathrup Village, MI
Posts: 1,481
Default Re: Which epoxy

I've recently switched from MGS 285 to MGS 335 due to price. I must say the 285 is much easier to use, less smell, and the hardner doesn't crystalize in the container. The slow hardner crystalizes in the container much quicker than the fast. Nevertheless, it's been readily available lately and I need to use it more frequently so the hardner doesn't crystalize.
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Old 01-24-2008, 10:42 AM
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Billski Billski is offline
Join Date: Sep 2005
Location: Saline, Michigan
Posts: 58
Default Re: Which epoxy

I use ProSet and love it. I buy it direct from Gougeon Brothers. I use 125 Resin for vacuum bagging and 135 for nominal wet layups. Yeah, the 229 hardener is slow, but for big or thick layups, it gives plenty of time for the vacuum bag to draw off the excess epoxy. I use 226 for smaller stuff.

I made some sample pieces and broke them in four point bending. They came in significantly above "book" values for strength. ProSet post cures. Its toxicity is low and no one in my list of helpers has developed any sensitivity to it.

Great stuff.

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