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Epoxy pigment #240606
11/30/11 08:33 AM
11/30/11 08:33 AM
Joined: Oct 2002
Posts: 1,226
Atlanta
bvining Offline OP
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bvining  Offline OP
veteran

Joined: Oct 2002
Posts: 1,226
Atlanta
I have a very small chip that I need to fix.

Can I add white paint to epoxy? The West Systems white pigment is expensive for a small repair.

Anyother white pigment ideas?

-- Have You Seen This? --
Re: Epoxy pigment [Re: bvining] #240607
11/30/11 08:37 AM
11/30/11 08:37 AM
Joined: Oct 2005
Posts: 1,152
tampa, fl
K
ksurfer2 Offline
old hand
ksurfer2  Offline
old hand
K

Joined: Oct 2005
Posts: 1,152
tampa, fl
I have used the gel coat repair kits that are available at West Marine with success for small chips. It comes in white that matches the gel coat on my infusion very well.


If your havin girl problems i feel bad for you son
I got 99 problems but my beautiful wife ain't one
Re: Epoxy pigment [Re: bvining] #240608
11/30/11 09:00 AM
11/30/11 09:00 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

Joined: Jun 2001
Posts: 12,310
South Carolina
Originally Posted by bvining
I have a very small chip that I need to fix.

Can I add white paint to epoxy? The West Systems white pigment is expensive for a small repair.

Anyother white pigment ideas?


I've used these in the past with success - but in dark colors. I've never tried the white...I would be a little concerned that the epoxy might still yellow after some time in the sun with a white pigment. However, I don't have any specific experience with that. Try here for cost effective resin pigments.

http://www.uscomposites.com/pigments.html


Jake Kohl
Re: Epoxy pigment [Re: Jake] #240650
11/30/11 08:43 PM
11/30/11 08:43 PM
Joined: Aug 2006
Posts: 297
R
rexdenton Offline
enthusiast
rexdenton  Offline
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R

Joined: Aug 2006
Posts: 297
If it is a chip, just use gel coat. Takes some getting used to the process but if you learn how, you are way ahead in repair costs.

The down side of epoxy is, as mentioned, it will yellow in sunlight, and it can also be very cranky to cover that repair with polyester gelcoat (the amines in epoxy blush out, causing the gelcoat to not to polymerize evenly, or at all.) That said, with some prep, it can be made to polymerize okay.

FYI, It is also not advisable to use epoxy on a polyester-made boat where the repair is perpetually underwater (i.e. a cruiser repair under the waterline), as it will eventually blister. This is not a problem on a beach cat, though.

http://www.michiganfiberglass.com/products.html

This outfit sells a bright white, high quality gelcoat and pigments that can be blended in to match aging gelcoat. It's a bit of an art but if you do it right, you will have a great match. Their supplies are better than stuff available from 'other retailers' (trust me on this...).

Last edited by rexdenton; 11/30/11 08:44 PM.

Nacra F18 #856
Re: Epoxy pigment [Re: bvining] #240651
11/30/11 08:52 PM
11/30/11 08:52 PM
Joined: Aug 2005
Posts: 2,921
Michigan
PTP Offline
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PTP  Offline
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Michigan
why hasn't anyone recommended Marine-Tex yet? It is, I guess, rather expensive, but it won't yellow. That's the first thing that came to my mind. Great stuff. easy to sand, easy to mold (use a glove, wet the finger with a little water when the stuff is putty)

Last edited by PTP; 11/30/11 08:53 PM.
Re: Epoxy pigment [Re: PTP] #240676
12/01/11 09:44 AM
12/01/11 09:44 AM
Joined: Oct 2002
Posts: 1,226
Atlanta
bvining Offline OP
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bvining  Offline OP
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Atlanta
Thanks for the replies guys, I forgot to mention that this boat is painted. Its carbon/epoxy/paint as an outer skin.

So, I dont think gel coat is the right answer, right?

Also, its two small chips on the bottom of the hull, so they wont see much if any sunlight, and its drysailed.



Re: Epoxy pigment [Re: bvining] #240680
12/01/11 10:04 AM
12/01/11 10:04 AM
Joined: Sep 2002
Posts: 3,224
Roanoke Island ,N.C.
Team_Cat_Fever Offline
Carpal Tunnel
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Roanoke Island ,N.C.
What paint? If it's just about anything but awlgrip you repair as normal Fill and paint. Are you just trying to save a step?

Gel coat is definitely NOT the answer.
PTP, Marine tex is more of a temporary patch not a permanent repair.


"I said, now, I said ,pay attention boy!"

The cure for anything is salt water - sweat, tears, or the sea
Isak Dinesen
If a man is to be obsessed by something.... I suppose a boat is as good as anything... perhaps a bit better than most.
E. B. White
Re: Epoxy pigment [Re: Team_Cat_Fever] #240681
12/01/11 10:10 AM
12/01/11 10:10 AM
Joined: Oct 2002
Posts: 1,226
Atlanta
bvining Offline OP
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bvining  Offline OP
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Posts: 1,226
Atlanta
yes, trying to save a step. I wasnt planning on mixing up epoxy with pigment as the chip/ding is less than an 1/8th of an inch.

Re: Epoxy pigment [Re: bvining] #240697
12/01/11 02:01 PM
12/01/11 02:01 PM
Joined: Jun 2002
Posts: 1,658
Florida Suncoast, Dunedin Caus...
catman Offline
Pooh-Bah
catman  Offline
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Joined: Jun 2002
Posts: 1,658
Florida Suncoast, Dunedin Caus...
Any bondo type putty will work fine. You can use a single sided razor as the spreader for something that small.

I like evercoat glazing putty. It's almost white so it will be hard to see the repair.

If you have gel coat w/wax you can thicken that and use it like bondo. Pretty much all these bondo type putty's are polyester based.

Last edited by catman; 12/01/11 02:26 PM.

Have Fun
Re: Epoxy pigment [Re: PTP] #240698
12/01/11 02:17 PM
12/01/11 02:17 PM
Joined: Jun 2002
Posts: 1,658
Florida Suncoast, Dunedin Caus...
catman Offline
Pooh-Bah
catman  Offline
Pooh-Bah

Joined: Jun 2002
Posts: 1,658
Florida Suncoast, Dunedin Caus...
It is easy to work with and will last as well as anything, however Gel coat will never cure over it.

Only West System can be Gel coated with no problems. My experience anyway.

Doesn't matter in this case as the boat is painted.


Have Fun
Re: Epoxy pigment [Re: bvining] #240716
12/01/11 07:29 PM
12/01/11 07:29 PM
Joined: Sep 2002
Posts: 3,224
Roanoke Island ,N.C.
Team_Cat_Fever Offline
Carpal Tunnel
Team_Cat_Fever  Offline
Carpal Tunnel

Joined: Sep 2002
Posts: 3,224
Roanoke Island ,N.C.
Originally Posted by bvining
yes, trying to save a step. I wasnt planning on mixing up epoxy with pigment as the chip/ding is less than an 1/8th of an inch.


If it's that small, why not just paint? Pool it up or lots of thinner coats and skip the epoxy.
I second catmans choice of fillers also. Love the evercoat glazing putty.


"I said, now, I said ,pay attention boy!"

The cure for anything is salt water - sweat, tears, or the sea
Isak Dinesen
If a man is to be obsessed by something.... I suppose a boat is as good as anything... perhaps a bit better than most.
E. B. White
Re: Epoxy pigment [Re: bvining] #240840
12/05/11 04:18 PM
12/05/11 04:18 PM
Joined: Feb 2009
Posts: 678
Palm Beach County
TheManShed Offline
addict
TheManShed  Offline
addict

Joined: Feb 2009
Posts: 678
Palm Beach County
I spoke to West System you can use unbound pigment. I has a been awhile since I spoke with them if you call their help line they can guide you in the correct pigment to buy. Sounds like you can go to any place that mixes house paint and get the pigment. Hopes that helps.

I ended up just buying their stuff because I needed a larger quantity.


Mike Shappell
www.themanshed.com
TMS-20 Builder
G-Cat 5.7 - Current Boat
NACRA 5.2 - early 70's

Re: Epoxy pigment [Re: bvining] #240924
12/07/11 01:22 PM
12/07/11 01:22 PM
Joined: Jul 2001
Posts: 1,253
Columbia South Carolina, USA
dave mosley Offline
veteran
dave mosley  Offline
veteran

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Posts: 1,253
Columbia South Carolina, USA
Check these guys out for Poly resins and carbon stuff.
http://www.fiberglasssupply.com/Product_Catalog/Polyester_Resins/polyester_resins.html

Also an easy fix to small problems is Formula 27, marine Bondo. dries white and sands easy and is less H2O permeable. dont know about gelcoating over it...sorry!

Last edited by dave mosley; 12/07/11 01:23 PM.

The men were amazed, and said, "What kind of a man is this, that even the winds and the sea obey Him?" Matthew 8:27





Re: Epoxy pigment [Re: dave mosley] #240926
12/07/11 01:47 PM
12/07/11 01:47 PM
Joined: Jul 2004
Posts: 125
Clinton, Mississippi
rattlenhum Offline
member
rattlenhum  Offline
member

Joined: Jul 2004
Posts: 125
Clinton, Mississippi
I've had good luck with these guys:

http://www.fgci.com/

I have used their white pigment in epoxy and it worked fine (is marketed as suitable for epoxies, polyester, etc.). Formula 27 is quite grey next to my boat's white gelcoat.


Jerome Vaughan
Hobie 16
Clinton, Mississippi
Re: Epoxy pigment [Re: bvining] #240929
12/07/11 03:07 PM
12/07/11 03:07 PM
Joined: Jan 2009
Posts: 5,525
pgp Offline
Carpal Tunnel
pgp  Offline
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Posts: 5,525
Thanks.


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.


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