How to waterproof Sunbrella?? - SailNet Community

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  #1  
Old 06-24-2008
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How to waterproof Sunbrella??

Is there anyway to waterproof sunbrella? The rain pools right in the center of my dodger and it drips right down the companionway. I have to put in the boards and close the hatch.

I have used Scotch Guard before on other things and it works well for a very short time. Is there something else that might work? Paint it with varnish? Inflatable dinghy paint? or ??? etc... Not that I want to 'paint' it, I want something that will waterproof it and still be invisible.

Thanks,

Steve
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Old 06-24-2008
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You should probably use 303 Fabric Guard. It will help, but you really need to modify the dodger so it doesn't have a low spot there.
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Last edited by sailingdog; 06-24-2008 at 11:48 AM.
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Old 06-24-2008
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This information sheet specificially states to avoid silicone based products on sunbrella. It looks like the product that sailingdog recommended does not have silicone in it. Our local canvas maker sells a product in a quart bottle that you brush on that restores the "water beading" quality to sunbrella. I've had good luck in the past with a boatlife product as well.

Waterproofing Canvas by Don Casey
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Erps-

303 High Tech Fabric Guard is what Sunbrella's makers recommend for use on Sunbrella.
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I can believe that. I didn't say otherwise.
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Old 06-24-2008
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Does the water seep through the fabric or is it simply that the dodger has a low spot that drains off the edge? If the later then try tightening the dodger as SD suggested. If it's coming through the material then waterproofing sprays will help but will be a short term fix only. Before I replaced my bimini I had that problem and tried a few sprays but none lasted longer than about a month.
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I was just clarifying why I was recommending it.
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Old 06-24-2008
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BlowinSouth,

If you find the 303 for a reasonable price, post it here please. That stuff is expensive....and it does work!
It needs to be reapplied during the season, and your pooling problem needs to be fixed or you will be throwing away money.
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Old 06-24-2008
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I've had good luck with this product: PTEF

Not sure how the price compares.
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Old 06-24-2008
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Quote:
Originally Posted by teshannon View Post
Does the water seep through the fabric or is it simply that the dodger has a low spot that drains off the edge? If the later then try tightening the dodger as SD suggested. If it's coming through the material then waterproofing sprays will help but will be a short term fix only. Before I replaced my bimini I had that problem and tried a few sprays but none lasted longer than about a month.
Yes, the water seeps through the fabric. The problem is that the dodger is old and as I tightenen it up to eliminate the low spot (pooling) it starts popping seams elsewhere.

I need a new dodger obviously but would like to get another season out of this one if possible. The 303 stuff sounds like a good start.
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