Vinylester/CSM moulds...


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GROPIUS
GROPIUS
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Hi there
I recently made some moulds made out of Vinylester/CSM.
The gel coat is Polyester based.
So now the question is...
...how long do I have to wait until I'll be able to use the moulds to build composite parts?

Btw...
...I'll be using ECs GC50 gel coat combined with epoxy resin on the composite parts.

fgayford
fgayford
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If you are at room temperature a few days will do it.

Just a suggestion from years of experience, do your self a favor and use EasyLease instead of the wax PVA route as a release agent.

Wax and PVA still have their place but its just so barbaric compared to the new chemical release agents.

I wonder what I have been doing all these years with wax and PVA.

My opinion!

Fred
GROPIUS
GROPIUS
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fgayford (29/03/2013)
If you are at room temperature a few days will do it.

Just a suggestion from years of experience, do your self a favor and use EasyLease instead of the wax PVA route as a release agent.

Wax and PVA still have their place but its just so barbaric compared to the new chemical release agents.

I wonder what I have been doing all these years with wax and PVA.

My opinion!

Fred
Cheers Fred,
that sound promising.

Would post-curing speed up the process?

and...
...got my EasyLease delivered with the GC50Wink 
Matthieu Libeert
Matthieu Libeert
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Yes it will, you need to get the styrene out of the mould and by applying heat you will smell the styrene meaning it is being removed from the mould Smile

Matthieu Libeert
Founder MAT2 Composites X Sports
website:
www.mat2composites.com




alebassa
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fgayford (29/03/2013)
If you are at room temperature a few days will do it.

Just a suggestion from years of experience, do your self a favor and use EasyLease instead of the wax PVA route as a release agent.

Wax and PVA still have their place but its just so barbaric compared to the new chemical release agents.

I wonder what I have been doing all these years with wax and PVA.

My opinion!

Fred


I'm currently making CF copies of my bike fairings. I use wax and pva for making first mould from the originals that I need to put back on the bike...
it make me feel safer than just chem lease agents, I really need the piece not to breack or loose paint. Does it make sense?

I then use the chem lease for making the part from the mould. Chem lease agent is much simpler and faster than wax and pva!!


Alessandro
GROPIUS
GROPIUS
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Used the EasyLease and...wow...that stuff is very slippy indeed!
Maybe to slippy for some applications...
Applied 6 coats...15 minutes between each and 1 hour before the GC50. 
I struggled to create a closed film using the GC50 with brush application.
Should I add 2 coats of wax or perhaps reduce the amount of Easylease?
Edited 12 Years Ago by GROPIUS
wozza
wozza
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Hi, I use Easy Lease and GC50 all the time. I have found that the only way to lay it down successfully is to spray it. I bought the the EC Gel Coat Gun.
Not cheap but works really well. After spraying it has an "orange peel" finish. (pic attached) The first time I sprayed it I thought that the finish on the part would be terrible, but once infused the part came out like glass.

Regards Warren

Carbon Copies Ltd
GROPIUS
GROPIUS
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If that's the case than the description of being brush-able is somehow misleadingCrying
Any other ideas guys?
I just can't justify using (and purchase) a gel-coat gun for small itemsCrazy
Help...please...I'm sure there must be a way around this?!!!
wozza
wozza
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Don't get me wrong you can apply it with a brush ( as described ) but I find you get a far better result if spray application is used. You just have to very gentle and use a very soft brush in continuous strokes. The technique does require practice I'm afraid. 

Regards Warren

Carbon Copies Ltd
fgayford
fgayford
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I have used easylease and another product called Chemlease. They seem to behave the same. I shoot clear coat in my molds the night before I infuse. The problem is the beading up because the surface is so slick. (by the way easylease is awesome and I wouldn't be without it)

One trick is to apply wax over the chemical release to make the surface a little more active, perhaps 3 coats of wax. Now you have the superior protection of the easylease and the greater tack of the wax. When you brush keep going over it until it lays down in one layer without beading and then stop. I have actually done this on a fairly large mold with clearcoat using a wide art painters brush. I kept brushing untill it no longer beaded. (it was gelling) That was on a surface of chemlease release agent.

 My opinion.

Hope this helps

Fred      
GO

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