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09-07-2011, 05:08 PM
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#1
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I Will not Admit my Addiction to RS
Join Date: Mar 2009
Location: 403
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How bad is polyester resin?
Hey guys,
I'm about to purchase some carbon parts. However, the company uses polyester resin and not epoxy for their carbon production. I asked around and did some google searches and found that polyester is of the lower quality. Making me extremely hesitant to go with the purchase.
I know many of you have carbon parts so I want to ask. How much of a difference is it? Is polyester really that brittle and will just shatter at the sight of sunlight or even a light bend?
my car will be parked indoors, but of course it will see sunlight and i won't be painting the parts anytime soon.
I have the option for fiberglass parts. Should i just opt for that instead?
Last edited by genesis195; 09-08-2011 at 09:39 AM.
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09-07-2011, 08:21 PM
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#2
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Need to Shave n Shower, but I CANT STOP POSTING ON RS
Join Date: Apr 2004
Location: Nanaimo
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Eboxy? 
Your fine many boat are made with polyester resin.
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Until the lions have their own historians, the history of the hunt will always glorify the hunter.
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09-07-2011, 08:31 PM
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#3
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racing & tech mod.
Join Date: May 2004
Location: Vancouver
Posts: 4,034
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It depends on the parts. For a sub-enclosure, polyester & fibreglass are the way to go. For a hood or fender, you'd want epoxy, vacuum bagged with a proper gel coat, finish, and careful strand/weave orientation. You have to see the pieces and make sure they are as nice as the pieces they advertise on the website.
Epoxy binds more effectively to strands than polyester does - so for a load bearing part like a hood, epoxy is a good idea.
Vinyl ester is an okay medium as well..
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09-08-2011, 09:43 AM
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#4
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I Will not Admit my Addiction to RS
Join Date: Mar 2009
Location: 403
Posts: 526
Thanked 81 Times in 29 Posts
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Quote:
Originally Posted by Manic!
Eboxy?
Your fine many boat are made with polyester resin. |
my bad lol epoxy*
Quote:
Originally Posted by Rich Sandor
It depends on the parts. For a sub-enclosure, polyester & fibreglass are the way to go. For a hood or fender, you'd want epoxy, vacuum bagged with a proper gel coat, finish, and careful strand/weave orientation. You have to see the pieces and make sure they are as nice as the pieces they advertise on the website.
Epoxy binds more effectively to strands than polyester does - so for a load bearing part like a hood, epoxy is a good idea.
Vinyl ester is an okay medium as well..
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The part i'm getting are front fenders. No load on it. I'm just really worried they will deform and turn into a ugly yellow color. I've been hearing some horror stories of polyester, but also some good ones.. not sure what to believe lol. But thanks.
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09-08-2011, 09:48 AM
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#5
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I contribute to threads in the offtopic forum
Join Date: Oct 2009
Location: richmond
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Epoxy resins are better. They don't discolor with exposure to UV, they are more flexible, more water resistant so they don't "fog" over and are more suited for higher heat applications. Most importantly when making parts for visual esthetics most epoxy resins dry crystal clear. Most polyester resins dry with a slight yellow tint.
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