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If it is a canvas type material, go to a sporting goods store and buy spray waterproofing for tents. I used to use it on my old boat cover and it worked well.
 

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I use 303 on alot of stuff to stop UV rays, but it doesn't seem to help waterproof sunbrella when I used it. I just used Coleman's "CAMP DRY" aerosol on my stuff. It was cheaper and on sale at the time. Seems to last a season. Now I got a lift with a cover though...I wouldn't do it on the boat though. Unless you do a real good job of keeping the overspray of the boat.
 

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3mmakes a good one,,,,,,, apply with the canvas in place stretched.
 

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RSCHAP1 said:
I use 303 on alot of stuff to stop UV rays, but it doesn't seem to help waterproof sunbrella when I used it.
the 303 fabric protector (green label) is different stuff than the UV protectant (blue label). I use the UV on the interior of the boat and my cars, great stuff.
 

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I have not used any of the ones stated above but my the company that made my canvas said they recommended scotchgaurd(water repellent). I used it and it worked great. I washed the cover and let it dry laid out on my garage floor, and sprayed a healthy coat on the cover. Let it dry and installed back on the boat. Worked great! Water beaded and just ran off. Lasted at least all season as I do it every year.
 

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Well to follow up on my question....I called the company who made my cover and told them I was having some leak through and they are sending me a 16 oz bottle of 303 to spray on the cover. Free of charge! Either they are aware of some issues or they are nice. Either way I will give the 303 a shot.
 

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I think all of those will work but if you find some with Aerosol spray, that would be the best. I have used just regular water proof spray (like for shoes) and that worked very well... and it evenly distributes the chemicals
 

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Discussion Starter · #11 ·
Thanks For All Input. Bought a couple items ,starbrite and some 303 Going to spray it on this weekend and use the best of the the 2. Ill Post My Results Wed or Thur.
Thanks Again
 

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RSCHAP1 said:
I use 303 on alot of stuff to stop UV rays, but it doesn't seem to help waterproof sunbrella when I used it. I just used Coleman's "CAMP DRY" aerosol on my stuff. It was cheaper and on sale at the time. Seems to last a season. Now I got a lift with a cover though...I wouldn't do it on the boat though. Unless you do a real good job of keeping the overspray of the boat.
Camp Dry is the stuff I used and it worked for about a season. I never sprayed it on the boat, always took the cover off, stretched it out on the drive and sprayed it there.
 

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Same here. Seemed like it was going to be a mess if I did it on the boat.

THANKS for the info on the "other"303 product. I probably seen it and never paid attention. If it's anything like their UV stuff, I am sure it's good dtuff. I'll have to check that out. :)
 
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