West System Microlight  
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West System Microlight - 1/25/2008 6:49:01 AM   
gosk8ing


 

Posts: 204
Joined: 5/15/2006
From: Melbourne, AUSTRALIA
Status: offline 		Hey,

I was mixing some polyester resin with some West System 410 Microlight the other day when I read the packet. There it states in bold, "DO NOT MIX WITH POLYESTER RESINS!", but it doesnt state why.
I went on their website and this is what they state about the product:

410 MicrolightTM is the ideal low-density filler for creating a light, easily-worked fairing compound especially suited for fairing large areas. Microlight mixes with greater ease than 407 Low-Density filler or microballoons and is approximately 30% easier to sand. It feathers to a fine edge and is also more economical for large fairing jobs. Not recommended under dark paint or other surfaces subject to high temperatures. Cures to a tan color.

Doesnt polyester cure at a higher temperature than epoxy? If so, thats why they state the above.

Do you think if 410 Microlight is cured at a high temperature, it could give off toxic fumes???

< Message edited by gosk8ing -- 1/25/2008 6:50:53 AM >
       Post #: 1

RE: West System Microlight - 1/25/2008 2:51:07 PM   
soarrich



Posts: 2375
Joined: 2/1/2002
From: Middletown, NJ, USA
Status: offline 		I think you'll find that the polyester will melt the micolite. I don't think it would be dangerous, just messy.

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Rich Border

(in reply to gosk8ing)
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RE: West System Microlight - 1/25/2008 6:18:47 PM   
TeamSeacats



Posts: 161
Joined: 3/9/2007
From: Greenville, SC, USA
Status: offline
quote:

ORIGINAL: soarrich

I think you'll find that the polyester will melt the micolite. I don't think it would be dangerous, just messy.


That sounds reasonable - I don't know what micro-light is constructed from, but the conflict with polyester is probably a chemical issue.

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Jake Kohl
http://www.teamseacats.com

(in reply to soarrich)
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RE: West System Microlight - 1/25/2008 11:05:46 PM   
seanreit



Posts: 6765
Joined: 4/17/2002
From: Cedar Park, TX, USA
Status: offline 		I've used cabosil in Polyester worked flawlessly for what I was doing. I never read instructions though, you should probably not read them too.

(in reply to TeamSeacats)
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RE: West System Microlight - 1/25/2008 11:17:23 PM   
soarrich



Posts: 2375
Joined: 2/1/2002
From: Middletown, NJ, USA
Status: offline
quote:

ORIGINAL: seanreit

I've used cabosil in Polyester worked flawlessly for what I was doing. I never read instructions though, you should probably not read them too.

cabosil and Microlight are differnt things. Microlight sands very easily, cabosil is like a rock.

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Rich Border

(in reply to seanreit)
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RE: West System Microlight - 1/26/2008 12:39:24 AM   
gosk8ing


 

Posts: 204
Joined: 5/15/2006
From: Melbourne, AUSTRALIA
Status: offline 		Ive mixed up about 4 batches and had no problem. One time my eyes got a little sore, but I think that was the polyester. On the last batch, the mix was a little dry (I find that when mixing with polyester, I have to make it wetter compared to epoxy), and when I went to sand it, it was very hard and kept cloging my sandpaper. I did notice after sanding for about 10 seconds, the area became pretty hot. Now I sand it wet and it never gets hot or clogs the sandpaper.
It doesnt look like the microlight melts when mixed with polyester
Just as a precaution, I now where a respirator when mixing the two.

Ive found the MSDS for the product, and the only thing I can find is this: 'Strong oxidants, especially when hot'

http://www.westsystem.com/webpages/userinfo/safety/MSDS410.pdf

(in reply to soarrich)
       Post #: 6

RE: West System Microlight - 2/3/2008 8:45:33 PM   
beenie



Posts: 379
Joined: 10/16/2002
From: Baton Rouge , LA, USA
Status: offline 		I use 410 alot for filling and fillet making. With the WS epoxy it sands almost exactly like balsa and feathers well. (Its light too) I have heard what it is made of but it has been awhile. I think that it is a phenolic product, although it could be some other plastic. I guess what ever it is the polyester could react with it.
Ben

(in reply to gosk8ing)
       Post #: 7

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