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2489Re: River Rat

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  • Jon n Wanda
    Oct 18, 2009
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      All epoxy products allow some vaper through but less then polyester or vinalester products. Plywood is not all the same so first it depends on the plywood knowing you may not seal out 100% of the water if some sits in the boat for a extended period. Fir plywod is knowen to check if it is coated only on the outside of a boat but it helps stop some checking. Glassing coating primeing and painting all work to some degree depending on use and matinace if it gets scrached. Encapsolating is a system where frames are sealed with three thin not thinned coats of epoxy the first soaka in the second seals the third getting what ever may have been to thin. The ply is sealed with a coat of epoxy on the outside and then glassed and sealed like the frames on the inside. A good way to do it is coat the first coat on the inside before applying so it seals the plywood where the frames are. This is a joint that may get a small crack so water can get into plywood. Two more coats of epoxy later. All epoxy surfaces that have been coated need to be lightly sanded to get a good primer and paint bond. Useing anty-freez on the wood can be a problem with some cheaper plywoods that don't have enough glue even if they are exterior grade because anty-freez is water base and the outside venear can get buckels in it. Glen-L boats has a good section onencapsolation and it will work with all brands of epoxy for laminating and coating many that will blush and that is explaned too.

      Jon

      --- In AtkinBoats@yahoogroups.com, "Sam" <sam321866@...> wrote:
      >
      > What about just coating all wood with a couple coats of regular epoxy? And what about the frame gussets? 1/4 in ply? 3/4?
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