I saw this product mentioned last week on TechTV, The ScreenSavers. I agree that it looked interesting. A guy had coated a handful of sand with the stuff and water could not penetrate it. He claimed he uses it on his boat and it drag and kept the baracles from attaching. All that aside, I'm not going to be the first one to put it on my PT. I am putting a second coat of Gary's sealer on tomorrow!!
RJ