- Sep 3, 2009For those not familiar with MDO - the spec sheets for the various kinds
are at this site:
The Crezon /Two Step is about the best "bang for the buck" whereas the
Signal is the premium quality brand and lighter in weight. Both are far
superior to marine grade fir plywood.
The big advantage with this is that the suface has been Heat and
pressure sealed with a resin overlay that totally prevents checking and
is ready to paint and engineered to use polyurethane-acrylic paints and
caulking used for exterior house finishing. No epoxy/fiberglass
finishing is required except below the waterline for better
waterproofing or if finicky, to prevent abrasion wear on the deck
Disadvantage is it cannot be finished bright, but I would suggest this
applies to most plywood.
The topsides on my boat have been primed with epoxy coating before the
paint but that is sort of a belt and suspenders option.
But - and this is a big BUT - there is now imitation MDO arriving from
off-shore I have heard and all bets are off with that. My supplier told
me that if it doesn't have "Made in USA" or "Made in Canada "stamped on
the edges of each sheet it is not the real stuff.
My guys have also suggested there is some pretty good "Baltic Birch"
coming in from Europe that is made to high standards. Now birch veneers
are supposed to be rot prone, but if properly protected will last a long
time. There is a boat builder in Poland who uses it and has great
success, and many kayaks are made with it over there.
--- In Michalak@yahoogroups.com, "recree8" <arvent@...> wrote:
> On two occasions I "piggy-backed" an order of thinner MDO on a bulk
order of construction weight stuff at my supplier and was not charged
> Heavier MDO is used for concrete forms, and some is used in other
areas of home construction. I wanted 3/8" crezone and they only had 5/8"
in stock.I ordered 10 sheets and had to wait. The next day I got a call
it was on its way and was nicely wrapped and strapped with two sheets of
luan on the outside for protection. They threw it in too:-)
> Obviously this would not happen with marine grade as it is not used in
home construction but it is always worth a try to tell the retailer what
you want it for and see if they can help you.
> I do know that Olympic panel products are used to doing this as their
sales rep told me about it!
> Not sure if that helps you though. What are you building?
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