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Hysol and Polyester Fiberglass Resin Compatibility - 8/18/2012 4:00 AM   
glowplugboy


 

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Status: offline 		Very simple question: Will Hysol adhere to a polyester resin fuselage if it is properly roughed up and cleaned?

Thanks,
Mike


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RE: Hysol and Polyester Fiberglass Resin Compatibility - 8/18/2012 4:11 AM   
brad59


 

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Status: offline 		The general rule is: Epoxy over Polyester is ok, vice versa is not. I have used epoxy on polyester resin successfully many times. Polyester won't cure over epoxy.
Brad

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RE: Hysol and Polyester Fiberglass Resin Compatibility - 8/18/2012 4:23 AM   
wyowindworks


 

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Status: offline 		You will get a good bond to the polyester.  In fact, it will bond to the polyester better than the polyester will.   Scuff the bonding surface with 80 sandpaper, clean with acetone, and bond away.   BTW, polyester will cure just fine over epoxy....it's just a very poor adhesive. 



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RE: Hysol and Polyester Fiberglass Resin Compatibility - 8/18/2012 4:27 AM   
glowplugboy


 

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Status: offline 		Many thanks gentlemen! I can't stand the odor of Polyester resin, so this is good news.

Mike


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RE: Hysol and Polyester Fiberglass Resin Compatibility - 8/21/2012 3:57 AM   
countilaw



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quote:

ORIGINAL: brad59

The general rule is: Epoxy over Polyester is ok, vice versa is not. I have used epoxy on polyester resin successfully many times. Polyester won't cure over epoxy.
Brad
[/quote


Polyester resin will cure just fine over    5 min epoxy,  however,    polyester will cure over  30 min epoxy,  but very slowly.   Like 24 hours at least.  Whenever I use  30 min epoxy to join  foam cores,    I have to seal the seam with  5 min epoxy before applying  fiber glass cloth and polyester resin. 

Before I  use any adhesive on the inside of a  epoxy glass or  fiber glass  fuselage,   I wipe with  acetone and then scuff the surface.   If it's an epoxy glass fuselage I use  5 min epoxy.    If it's a   polyester resin fuselage,  I  use  polyester resin.   I've never had a problem with  polyester bonding to polyester.    But  since   most all  fiber glass parts today or   epoxy resins,   just use   5 min epoxy. 

Frank




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