In article ,
Don White wrote:

wrote:
Would I need to use a special kind of plywood - some "marine" grade
or something? I think that the existing floor is coated with Cetol
which is why I thought that would be the best finish to put on.


I've read that the glue in outdoor plywood is the same as used in the
marine version. The major difference is that all the 'knot hole'
voids are filled in the marine grade but not so in outdoor grade.
Since your dingy is old and will probably be replaced within 3-5
years, I'd go with the cheaper plywood and seal it well with a good
oil primer/paint. (or Cetol if you already have some)

It's not the same glue. Additionally, marine ply doesn't mix woods
(which expand and contract at different rates, breaking bonds quickly)
and the plies are thinner - more plies & greater strength.

Though I love Cetol, the floorboards can be taken home to refinish
properly and varnish is better for this application as it stands up to
abrasion better.

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
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