This is why the Jon boat was half full of water when I pull the cover back... I forgot to seal / waterproof the cover last fall! Just like a tent, anywhere the cover touches something, water will run right through if not sealed. I grabbed a few cans of tent waterproofing from Walmart, and treated both the Jon boat and Bass boat covers. Just put the cover on the boat, spray until wet, and let dry. We had some storms the very next day and all was dry inside. Yay!
