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Old 05-23-2011, 04:02 AM
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Default How to restore my Canvas

The canvas [Sunbrella] on my boat is 7 years old. The color is fine, but it is getting a little worn. My problem is the canvas doesn't shed water like it used too. I always use the 303 aerospace protectant [green bottle], and lately it's not working to good. I know the canvas is getting old, but read on some other forums that you can use Thomsons Water Shield, or some other deck water proofer's. Will this stuff restore my canvas or ruin it. Does anybody have any experience with this stuff...

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Old 05-23-2011, 05:10 AM
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I would use the 303 and apply it twice. Thompson's isn't even the best protector for wooden decks. I wouldn't use it on boat canvas.

I actually used Starbrite's canvas protectant on my canvas. It's probably ten years old and has been patched and restitched. The Starbrite canvas protectant made it waterproof. You might want to try it instead.
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Old 05-23-2011, 05:17 AM
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Sunbrella recommmends 303 Fabric Guard, not Aerospace Protectant which is formulated for vinyl etc. That could be your problem.
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Old 05-23-2011, 05:31 AM
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You can see Star brite Waterproofing being applied to 10-year old canvas at
www.starbrite.com in the How To Video section
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Old 05-23-2011, 07:26 AM
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Lay your canvas out on your driveway and use that Starbrite waterproofing. It'll extend the life of your canvas significantly. They also have an electric pump that fits in their can that really works well, saving all that squeezing of the trigger.
Get a gallon of the waterproofer and the battery powered sprayer and you're good to go. It works!!
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Old 05-23-2011, 02:18 PM
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Quote:
Originally Posted by pjitty View Post
The canvas [Sunbrella] on my boat is 7 years old. The color is fine, but it is getting a little worn. My problem is the canvas doesn't shed water like it used too. I always use the 303 aerospace protectant [green bottle], and lately it's not working to good. I know the canvas is getting old, but read on some other forums that you can use Thomsons Water Shield, or some other deck water proofer's. Will this stuff restore my canvas or ruin it. Does anybody have any experience with this stuff...

Joe D
have a hard top built never have to worry bout that anymore
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Old 05-23-2011, 02:56 PM
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Quote:
Originally Posted by williscustoms View Post
have a hard top built never have to worry bout that anymore
It's really hard to roll a hardtop up when you don't need it.
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Old 05-23-2011, 02:58 PM
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Quote:
Originally Posted by rwidman View Post
It's really hard to roll a hardtop up when you don't need it.
very true cant have it all tho.
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Old 05-23-2011, 03:01 PM
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I have had more than one canvas fabricator explain to me that dirty canvas will not shed water no matter how much water proofing you apply. The embedded dirt acts as a conduit for the water to flow thru the material and the water proofing will only slow it down. Either wash it yourself using something like dawn dish washing liquid or have it clean professionally. Then apply the 303 or other quality waterproofing (not Thomson's). Sunbrella will last a long time if maintained this way.
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Old 05-24-2011, 05:12 AM
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stevenp is correct with regards to 303. It needs to be 303 High Tech Fabric Guard. You can apply two coats as rwidman suggested -- two thin coats will actually perform better than one heavy coat. Check the care and cleaning instructions on our web site.

With regards to Thompson's, there are boaters who swear by it but tests by our R&D team show that it makes the fabric stiff (boardy) and brittle. It's application would also void your fabric warranty.
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Old 05-24-2011, 06:05 AM
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I have a friend of mine that does boat canvas for a living and has been doing it for about 20 years. He takes mine to a laundramat and washes it in a commercial size machine. According to him you need to clean it before you treat it. He then treats it with 303.
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Old 05-24-2011, 07:14 AM
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You absolutely, positively HAVE to clean the fabric before you treat it with a waterproofing agent. That should be a given, but I guess it isn't. Clean it first to get the gunk off that would otherwise impact the effect of the waterproofing agent.

btw, step away from the pressure cleaner unless you want to watch the fabric go away.
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Old 05-24-2011, 11:01 AM
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Just to reiterate billatstarbrite's statement -- no matter what you use for a fabric treatment nor whether its Sunbrella or another fabric, cleaning is an absolute must before applying a treatment. You want to treat the fabric, not the dirt, grime or gunk that may be on the fabric.
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Old 05-24-2011, 01:22 PM
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This may be somewhat unrelated, but since the "expert" product people are here, what the heck. What is the best product to use on the PVC coated T-top material? I don't have sunbrella, its like a vinyl or PVC coated cover. I use the 303 vinyl protectant....any other suggestions? And yes, I also clean it before applying that stuff too.
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