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Old 06-25-2012
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Deck Repair Materials

I'm getting ready to repair a bunch of spider web cracks & a couple of areas that need structural re-enforcement on the deck prior to paint. Seeing how my hull is polyester resin, it seems logical to me to continue the use of this product w/ a high density filler like West 404, which I already have. I'm priming the grinded out areas with Interlux 2000 prior to filling/fairing.

Some of the stuff I've read about deck repairs suggests using epoxy w/ low density filling/fairing compound like West 407, other articles recommend the use of a vinylester filler to patch & fair the gel coat areas.

Is there any reason why I can't/shouldn't move forward using a high density filler with polyester resin? Once it's cured, I'd wipe it down w/ acetone, then soap & water prior to laying down the paint undercoat/primer.

Thanks in advance,
Bob
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Old 06-26-2012
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Re: Deck Repair Materials

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Originally Posted by misfits View Post
I'm getting ready to repair a bunch of spider web cracks & a couple of areas that need structural re-enforcement on the deck prior to paint. Seeing how my hull is polyester resin, it seems logical to me to continue the use of this product w/ a high density filler like West 404, which I already have. I'm priming the grinded out areas with Interlux 2000 prior to filling/fairing.

Some of the stuff I've read about deck repairs suggests using epoxy w/ low density filling/fairing compound like West 407, other articles recommend the use of a vinylester filler to patch & fair the gel coat areas.

Is there any reason why I can't/shouldn't move forward using a high density filler with polyester resin? Once it's cured, I'd wipe it down w/ acetone, then soap & water prior to laying down the paint undercoat/primer.

Thanks in advance,
Bob
Use epoxy filler - polyester has poor secondary bonding characteristics. The difference in cost is insignificant with the amount you'll use.
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Old 06-26-2012
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Re: Deck Repair Materials

Bob,

Do you have gel coat cracking, or cracks into the laminate? Very different problems, that require very different solutions.

For gel coat cracking, they typically indicate that the gel coat was applied too thickly in the mold, and a simple gel coat repair is called for. A drummer tool, and a gel coat patch kit is all you should need.

If its a structual problem, then you need to reinforce what ever is flexing too much before making the repair. But the gel coat fix is still the same.

If there are cracks into the fiberglass laminate it is a whole different problem that almost defiantly needs professional help.
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Old 06-26-2012
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Re: Deck Repair Materials

The gelcoat cracks are for the most part just that. Sabre actually mentions this in the owners manual. The majority of areas that have the cracks/spider webs are exactly where Sabre says they'll be. I have the polyester resin & filler left from another part of this project, guess I was just being cheap.... For these areas I'll go with a 3M vinylester filler for the bonding characteristics.

A couple of areas I'm grinding down & adding some glass to beef things up structurally.
Don't care about matching the gelcoat, the topsides are being painted.

Thanks guys!
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Re: Deck Repair Materials

Get rid of the polyester and get some epoxy for the filler. It's a lot easier to work with, and doesn't have the bonding problems that polyester does. For this, you can use a fairing compound instead of high strength filler, since the repairs aren't structual.

Apply, sand, then paint.

Polyester has a bad habit of not liking to bond to finished substrates, and can only achieve a moderate physical bond. Even then the surface needs to be clean, very rough to get good tooth, and it just won't bond to some materials. Epoxy on the other hand just needs a surface free of dust.
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Re: Deck Repair Materials

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Originally Posted by Stumble View Post
Get rid of the polyester and get some epoxy for the filler. It's a lot easier to work with, and doesn't have the bonding problems that polyester does. For this, you can use a fairing compound instead of high strength filler, since the repairs aren't structual.

Apply, sand, then paint.
Makes sense... Thanks!
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