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post #1 of 16 Old 03-25-2016 Thread Starter
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Canvas Treatment/Waterproofing

I've noticed that my dodger and sail cover seem to be getting a bit faded and ready for some kind of treatment. Have seen a few different products and am inclined to use the Scotchguard line if only because they've been around forever. Has anyone tried the other brands like Starbright for comparison. I think I used Starbright last time; about three years ago. It worked ok but it seems that it has dissipated. How often do others recoat?

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post #2 of 16 Old 03-25-2016
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If it's waterproofing one of the best is 303, it's recommended by Sumbrella
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post #3 of 16 Old 03-25-2016
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Re: Canvas Treatment/Waterproofing

If you used the Starbrite stuff, it contains teflon. You may be stuck with Starbrite again since nothing else is going to stick.
Second the motion on the 303, their products are the only ones recommended by Glen Raven, the maker of Sunbrella. It might be worthwhile giving them a call and finding out if 303 will go over a PTFE treated surface.
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post #4 of 16 Old 03-25-2016
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Re: Canvas Treatment/Waterproofing

I've used the 303 and was very satisfied with the product. It went on easily and I got a significant improvement in the (how to say this ) water resistance on my (then) older dodger. Also, when it dried, you could see no color changes.
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post #5 of 16 Old 03-25-2016
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Re: Canvas Treatment/Waterproofing

Keep in mind that if you can look up at the bottom of the canvas on a clear day and it appears like a a starlit night, tiny pin holes throughout, there is no water proofing that will work - it will still leak. The water proofing products merely fill in the holes to some degree, but you may be faced with replacing them, which by the time they begin to fade is pretty much a given.

All the best,

Gary
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Re: Canvas Treatment/Waterproofing

I believe 303 will dull the color of very light fabrics. Most seems to have dark blues and browns, but if you're the exception, test it first.

Gary is right, nothing restores the waterproofing, like new fabric.
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Re: Canvas Treatment/Waterproofing

Keeping Canvas in Tip-top Shape - Practical Sailor Print Edition Article

I tested a bunch of them side-by-side for several years, re-applying as needed (awnings and sail covers divided in sections, and also fixed test panels). Yes, 303 is a top pick, as is Starbrite. I would skip Scotchguard--great at first, but didn't last. Also consider Nikwax, very respected in the field and also good on Goretex, sheets, and furling lines.

Do be careful to keep these away from the windows. All of them will cause some harm.

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post #8 of 16 Old 03-25-2016
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Re: Canvas Treatment/Waterproofing

I have Weblon for canvas. It seems to last 8 to 10 yrs in Tropics from previous experience. If you apply Starbrite Waterproofing with PTEF to it once a year before summer on a wiped clean with a rag then hose to remove dirt and crap it will last close to 14 yrs. This from past experience.

I never liked Sunbrella as when it rains hard the rains blows through in a mist no matter what you apply to the fabric. It also seemed the sun came through it tween the threads. I tried vinyl and it did keep rain completely out but it only lasted 6 yrs full time in Tropical sun. I never tried the Starbrite stuff on it.
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post #9 of 16 Old 03-26-2016 Thread Starter
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Re: Canvas Treatment/Waterproofing

Quote:
Originally Posted by travlineasy View Post
Keep in mind that if you can look up at the bottom of the canvas on a clear day and it appears like a a starlit night, tiny pin holes throughout, there is no water proofing that will work - it will still leak. The water proofing products merely fill in the holes to some degree, but you may be faced with replacing them, which by the time they begin to fade is pretty much a given.

All the best,

Gary
Thanks Gary. Making a new dodger and sail cover are on the list but they're still fairly solid, with a couple of years left in them. Neither is leaking yet.

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post #10 of 16 Old 03-26-2016
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Re: Canvas Treatment/Waterproofing

Agree on 303 for sunbrella, but don't forget to properly clean the canvas first. Check with the manufacturer of your canvas for cleaning procedures.

I've had good luck and waterproofness for over 11 years on my (sunbrella) dodger and bimini.
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