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Old 11-10-2012, 11:48 AM   #8
Capn Craig
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Join Date: Oct 2010
Posts: 519
I have tried Thompson's on 10 year + Sunbrella. I have also used 303 both prior to and after the Thompson's. The 303 works better albeit at 4 times the cost. But even at that the cost of the 303 wasn't a factor. The Thompson's worked but the result was not 100% effective. My Sunbrella was pretty worn at the time I used it. I could not find any harm from the Thompson's. The color might have darkened slightly. There was no runoff stains on the fiberglass as I feared might happen. The Thompson's might have faired better if my Sunbrella were newer. After the Thompson's trial I went to the Starbright waterproofer 303 equivalent. Not much better than Thompson's but better than nothing. After that I returned to 303. The 303 is definitely the superior product.
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