How far does 303 High Tech Fabric Guard Go? - SailNet Community

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  #1  
Old 02-12-2011
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How far does 303 High Tech Fabric Guard Go?

Hello again, folks. I'm in a quandry (which is somewhat smaller than my dinghy and much less stable so the sooner I get out of it the better).

My mainsail cover was old, dirty, stained, the seams are falling apart, and the zipper was disintegrating. I found a new zipper online and had my local tailor put it in and restitched it for $80 labor (great gal, that one!) -- I washed it and now it looks pretty good. The only thing left is to waterproof it.

I did my homework and want to use 303 High Tech Fabric Guard, but for the life of me I can't find coverage figures, not even on the 303 site! Can someone give me a clue how far this stuff goes, preferably in units my pitiful engineering mind can work with, say square feet per quart?
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Old 02-12-2011
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It's going to vary so much according to what you're spraying it on that coverage figures will always be wrong. It may cover 200 square meters of a tightly woven synthetic, where nothing is absorbed, and only 20 square meters of dry cotton that soaks up lots. If you paid for a new zipper and then another $80 to have it sewn on, and now have to buy five or six cans (who knows?) of fabric guard so you can end up with a mottled (from the fabric guard) sailcover... you may have been better off going to Omar the tentmaker for a new sailcover in the first place. Perhaps not. Depends how much fabric guard you need. But old fabric is likely to soak up more than new.

Last edited by paulk; 02-12-2011 at 09:58 PM.
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Old 02-13-2011
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Thanks, Paul

I had expected some variability but not that much.

Sadly, Omar the tentmaker does not live near N. VA. I was seeing my size of sailcover selling for around $450 when I looked. The fabric in my old one is in pretty good shape so I looked at repair and renewal instead. So far I have $100 invested in the zipper and labor. Even if I buy a gallon of 303 High Tech Fabric Guard for $100 at West Marine (or may $90 online -- I'm still looking), I'm still saving money.
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Old 02-14-2011
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Can't give you coverage figures, but I can tell you that we were able to spray our entire dodger/bimini and enclosure pieces with a can, and that was with two coats. And... the stuff really works. Our bimini was really leeching water through prior to the re-waterproofing. It has been two years since we sprayed and we're still dry.
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Old 02-14-2011
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This is what is says on the Amazon.com website:

Product Description
303 Fabric Guard - 303 High Tech Fabric Guard restores lasting water repellence to marine canvas. It stops leaks, protects against soiling and both water and oil-based stains, and resists mildew formation and RV sun damage. Spray on, let dry. Every 16 oz. treats 75-100 sq. ft. of marine canvas. 303 High Tech Fabric Guard is also your best choice for fabric upholstery, carpeting and breathable wet weather gear.

Amazon has a pretty good price if you have Amazon Prime free shipping.
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On the defender site, they sell a 22 oz spray can of Armada and claim 100 sq ft for sunbrella. You get a larger can of Armada vs the 303. Don't know if there is any difference in quality.
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Old 02-14-2011
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Amazon has a pretty good price if you have Amazon Prime free shipping
Yup, been using the service since April 2010 and will renew again this year. I've become spoiled with Amazon Prime.
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Originally Posted by carl762 View Post
Yup, been using the service since April 2010 and will renew again this year. I've become spoiled with Amazon Prime.
I just ordered shaft zincs for $6 each. Combine that with free shipping an it is a deal.
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