[PSUBS-MAILIST] gel coat nightmare

Sun Dec 16 15:46:59 EST 2018

https://www.fibreglast.com/product/gel-coat-troubleshooting-guide/Learning_Center
<https://www.fibreglast.com/product/gel-coat-troubleshooting-guide/Learning_Center>

most common:

- to tick and as result:  to hot, endterme overheating
- wrong mixture to much peroxid? As result overheating
- to much humindty
- to much divider wax

vbr Carsten

-----Original-Nachricht-----
Betreff: Re: [PSUBS-MAILIST] gel coat nightmare
Datum: 2018-12-16T21:16:23+0100
Von: "Brian Cox via Personal_Submersibles" 
<personal_submersibles at psubs.org>
An: "Personal Submersibles General Discussion" 
<personal_submersibles at psubs.org>

 Here is what the gel coat did,  I'm thinking it was more a function of the 
thickness of the gel coat rather than letting it sit too long , probably 
both issues affected the crinkling effect.

Brian  

--- personal_submersibles at psubs.org wrote:

From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
To: "Personal Submersibles General Discussion" 
<personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] gel coat nightmare
Date: Sat, 15 Dec 2018 21:21:58 -0800

Rick,       Thanks Rick, as long as I can share with somebody else's misery 
I can carry on !     There are a lot of factors that affect the resin, 
humidity is a big one along with temperature.  Definitely not as easy as 
making a surfboard !   Luckily I have a guy that is sort of guiding me 
through this,  I ran into him in the boatyard and I've been calling him 
when I get in trouble, a very helpful guy, he says he can sympathize since 
he's already been through it.  But he says even the pro's  have issues 
sometimes when the elements throw you a curve ball.  I thought by waiting 
until the next day it would be better since the shop would be warm during 
the day but I didn't realize the critical time frame on applying the resin 
after the gel coat.

Brian  

--- personal_submersibles at psubs.org wrote:

From: Rick Patton via Personal_Submersibles 
<personal_submersibles at psubs.org>
To: psubs chat room <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] gel coat nightmare
Date: Sat, 15 Dec 2018 17:09:54 -1000

I hate working with glass and am not looking forward to making my MBT's!  
if it's any consolation, I knew of a guy who was building his own 36' 
sailboat out of fiberglass in the late 60,s and he didn't get the 
resin/hardener ratio correct for the temperature and humidity for that day 
and it never set up all the way! Never did hear what he did but probably 
sold it as is where is and went out and bought one all ready done!
Rick

On Sat, Dec 15, 2018 at 1:25 PM Brian Cox via Personal_Submersibles <
personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> > 
wrote:
  Hi All,
                   Fun and games with my gel coat project !   Thought I was
  doing everything right but apparently not.  After waxing my mold 4 times
  ( 4 layers) then I applied the PVA mold release with a spray gun, that
  went well, so far so good.  Then time to spray the gel coat,  that went
  well also, though I probably did not spray a thick enough layer, but my
  big boner of a mistake was letting the gel coat sit too long, apparently
  I was suppose to apply the resin and fiberglass layers while the gel coat
  is still tacky otherwise the gel coat material changes chemically over
  time and crystallizes .  Anyway the result is a big gooey mess, luckily I
  was able to stop before getting too far along.  Instead of the gel coat
  adhering  to the fiberglass it started breaking down and melting into the
  resin and it got all crinkly.  So now I'm going to to wait and let what
  I've done set up so I can pull it off and start all over again !

  Brian

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