| Re: Gelcoat
[Re: JACKFLASH]
#218592 08/30/10 02:33 PM 08/30/10 02:33 PM |
Joined: Jan 2004 Posts: 330 srm
enthusiast
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Posts: 330 | I think your ratio's are off. When using layup resin one ounce of resin would use 10 drops of hardner. I would assume that gelcoat would be a similar property. Pledge in the spray can is a great air inhibitor and readily available. I agree. The number that comes to mind is 12 drops of hardener per ounce for polyester resin. I've had good results using the west marine finish gelcoat with wax in the formula. Mixing throughly is also important. Once you think you've mixed it enough, mix it some more. sm | | | Re: Gelcoat
[Re: Mike Hill]
#218638 08/31/10 10:54 AM 08/31/10 10:54 AM |
Joined: Aug 2010 Posts: 3 fastcats
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stranger
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Posts: 3 | Grab some of your girl's hair spray. Spray it on there. Then apply just a little heat from a hair dryer. Don't go melting anything. That will start the reaction. Wait 24 hours then sand.
What brand of hair spray? | | | Re: Gelcoat
[Re: dave mosley]
#218718 09/01/10 11:29 AM 09/01/10 11:29 AM |
Joined: Jan 2009 Posts: 5,525 pgp
Carpal Tunnel
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Carpal Tunnel
Joined: Jan 2009
Posts: 5,525 | I'm not aware of any. However, I've heard that using too much catalyst with epoxy can leave soft spots. Can't speak to the truth of it.
Pete Pollard Blade 702
'When you have a lot of things to do, it's best to get your nap out of the way first.
| | | Re: Gelcoat
[Re: pgp]
#218719 09/01/10 12:43 PM 09/01/10 12:43 PM |
Joined: Feb 2004 Posts: 144 Near SLC, Utah tomthouse
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Posts: 144 Near SLC, Utah | I can also tell you, from personal experience, that you certainly can add too much catalyst.
On one occasion I was very impatient, it was quite cold and I added lots more than called for.
The mixtures heated dramatically, then bubbled into froth and finally harden into a gooey consistency like messy foam.
It was very interesting to watch.
The final mess was (shall we say) less than useful so don't get carried away, as I did.
Last edited by tomthouse; 09/01/10 12:50 PM.
| | | Re: Gelcoat
[Re: Karl_Brogger]
#218770 09/02/10 12:03 PM 09/02/10 12:03 PM |
Joined: Sep 2003 Posts: 270 Nepean (Ottawa) Ontario Canada Frozen
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Posts: 270 Nepean (Ottawa) Ontario Canada | Wax paper is Wax paper Karl. You get it at the grocery store next to the tin foil. Right, I know where my hats come from. I was just fishing around in the pantry, (I wrote panty the 1st time, which'd be odd if I came across parchment), anyway, and I found parchment paper. It worked, nothing stuck to it. Blue 3M masking tape refused to sick so I figured it'd work. The stuff I put down last night was rock hard this morning, so I roughed out the sanding and figured out where I needed to build it up more yet and laid down a second coat. I put in way more hardener than I thought I needed, and I probably did go too much because it started to thicken in a few minutes. It was also 90F today, but that set hard in 1/2hr, which was helped a bit by the sun. They aren't perfect, but both have tips again. I need to do some more touch ups yet, but I'm leaving for Nebraska tomorrow morning, so thats not going to happen. Thanks again for the help guys! The gelcoat hardening must have been related to the paper being in the panty er pantry.. Most likely the problem was not enough hardener. The other things were just a bit helpful. If you stir it well I am not sure it helps to dirty two containers. I personally only do small batches at a time so I do not waste it when it hardens quickly. I also use rubber gloves because the stuff is a pain to get off. You can also put "liquid gloves" on which keep the stuff from sticking to your skin. What is the problem with using plastic? I use it regularly with gelcoat and polyester. Never had a problem. In fact I think I remember someone telling me that if you put plastic or waxpaper over it as it hardens then the wax stays in the polyester so the next coat will stick better. I put cloth or chopped cloth on with polyester initially and then put plastic on, then I squeeze out as much resin as I can and then put a many times folded rag on top of that and then a piece of wood to hold it in place and then I put as many spring clamps to push on it as I can fit. This is to squeeze out more resin. My repairs come out excellent. Took me many a repair to figure this stuff out. Anyone know where I can find carbon fiber in cloth or ribbon at a reasonable price?
Cheers Alan F
Tiger
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