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MattMunson Profile
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Apprentice
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Re: FIBERGLASS?


Quote:

reevz666 wrote:

I use Epoxy resin as there isn't nearly as much odor as the [sign in to see URL] I use the fiber glass cloth for molds that are larger and glass fiber for the smaller stuff



Agreed on all points. Polyester resin is just the stinkiest stuff you could ever imagine. Even if you're just doing a tiny project, it'll smell up the whole neighborhood. Do something larger... well, you get the idea.

Polyester also tends to shrink a lot more. If you pick up a kit at Home Depot or the auto supply store for ten bucks, you'll get what you pay for. Low quality, high shrinkage, and stink to high heaven.

Yah, the epoxy stuff is more expensive, but there's a reason for that. It's better in every way. West systems sells a one gallon kit for like 70 bucks, and they may sell in smaller quantities.

1/4/2009, 7:40 am Link to this post Send Email to MattMunson   Send PM to MattMunson
 
EchoSix Profile
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Re: FIBERGLASS?


West System brand epoxy resin is the absolute, very best stuff on the market. You simply will never find a better product.

I've used West System on many, many different applications over the years. Though never with mold making of course, but rather the construction/carpentry/woodworking field I work in. Most recently I actually had the opportunity to use it on what it's #1 intention is actually for... Boat construction. First and foremost, it's a marine grade epoxy, meant to take the beating that ocean waves and salt water can dish out. The America's Cup yachts use that very brand on their boats, so that's gotta' say something.

Usually, other than high end woodworking stores and lumber yards, the only place you can typically get it is at a marine yard/store.

And, oh. My. God, is it expensive. :confused






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"An error doesn't become a mistake, until you refuse to correct it."

1/4/2009, 8:16 am Link to this post  
 
batfink6 Profile
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Re: FIBERGLASS?


ive used polyester resin for years.
ive never experienced shrinkage.
i use it in a garage so i dont notice the smell.
but as for shrinkage,maybe im using a different type of polyester to you guys??

epoxy resin in the uk is 3 times more expensive than polyester,so i have no need for the extra expense when i can use poly.
and the quality of the item you make depends on your experience at layering,and gelling.
1/4/2009, 8:34 am Link to this post Send Email to batfink6   Send PM to batfink6
 
ChuckNorrisAmen Profile
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Re: FIBERGLASS?


Just recently I've been doing a lot of fiberglass work for armor pieces as well. I've tried both the "braided" cloth and the "stringy" cloth (technical words, huh?)and I find that the latter works better and is more durable. The Woven cloth seems to raise in some places. Keep in mind that I am no expert with this stuff, I am just working from experiments and prayers. :p

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AngelOfDarkness22 Profile
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Re: FIBERGLASS?


Hey everyone, thanks for the info. Can I get the epoxy resin at home depot? If so, how much? Its like $60-$80 at the marina. Second, How many layers of cloth, (ie; how thick,) would I have to use to make something strong enough to stop a knife or baseball bat without cracking? Not looking to stop crime or anything just trying to make it seem more functional.

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"You say the world doesnt need a saviour, but every day I hear people calling out for one..."
1/5/2009, 1:44 am Link to this post Send Email to AngelOfDarkness22   Send PM to AngelOfDarkness22
 
MattMunson Profile
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Re: FIBERGLASS?


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AngelOfDarkness22 wrote:

Hey everyone, thanks for the info. Can I get the epoxy resin at home depot? If so, how much? Its like $60-$80 at the marina. Second, How many layers of cloth, (ie; how thick,) would I have to use to make something strong enough to stop a knife or baseball bat without cracking? Not looking to stop crime or anything just trying to make it seem more functional.



I have never seen epoxy resin at home depot. However, google is your friend. There's a million people online selling the stuff. Poke around.

The cloth is good for large, flat surfaces. So if you're building a boat, or a corvette, go with the cloth. If you're doing something with a lot of tiny, intricate detail, or tight curves, you'll want to go with the fiberglass matting.

I'd recommend you check out youtube or something for a fiberglassing tutorial that you can watch. Or just go to your autoparts store and ask some questions.

As for stopping a knife or baseball bat without cracking, I doubt anyone would have anything but a wild guess. In general, the way fiberglass reacts to trauma is to crack. It bends a little, but then it has to distribute the shock somehow, and that usually results in a crack or snap. However, I would NEVER depend on fiberglass to help you in that type of situation. A good pair of running shoes would probably suit you much better :)
1/8/2009, 7:41 am Link to this post Send Email to MattMunson   Send PM to MattMunson
 
inkmonkey Profile
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Re: FIBERGLASS?


Let me know if you need someone to swing the bat in your field tests.
 :nahnah

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1/8/2009, 10:25 am Link to this post Send Email to inkmonkey
 


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