waterproofing

I just got a chart plotter, and am quite happy with it (especially the AIS overlay.) However, I would never go out without paper charts as backup. Normally this doesn't matter -- I can navigate by eye in and near the bay, and one chart in a vinyl case* works fine for eyeballing. However, I'm...

Hi All, Just wondering what people have found works well for waterproofing their dodger Sunbrella. I have used the 303 stuff but find it is very expensive & doesn't cover well. Another fellow at the marina just went to a hardware store & bought a gallon of silicone tent waterproofing & used...