I bought two grades of Sunbrella when I upholstered my boat - thinner for the seats and a thicker version (awning grade) for the canopy / cover. I assumed that the thicker stuff would cause water to bead off, which it seemed to do 12 years ago. Every time I go through a rain storm trailering the boat, it sheds most of the water, but alot soaks through.
Anyone have any idea if the waterproofing agent has simply weathered off, or if I was supposed to treat it with something?
I suppose I could go to the Sunbrella website and scour it for recommended products, but wondering of Thompsons Water Seal would work.