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Plywood chat - went to local timber merchant - asked for hardwood WBP ply for external use - given this stuff - very thin stripy veneer top surface and plenty of filled voids - seems shit - was also warped. Any idea if it actually is wbp ? I’ve started using it for an external storage cupboard top and door - no sure if will hold up now . Some white osmo on the top one btw - to be followed by clear.
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Sheppz
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put an offcut in the dishwasher for a few cycles and see how it fares.
definitely use something more durable than osmo oil to finish though - as @dbr said an oil based paint (or alternatively a 2 part epoxy sealer) and thin the first couple of coats with a suitable solvent so it gets right into the grain and edges.
lmamammal
I didn’t say that it did. I was just pointing out it’s a waste of money to use for a worktop (more so considering it looks minging compared to birch).
Marine ply is used in marine applications due to a combination of the glues, lack of voids and the species of wood (traditionally mahogany) as the oils/resins react with saltwater and provide protection.
BS1088 addresses this somewhat but is pretty vague, so despite it all being called marine ply, not all of it is ideal for building a wooden hulled boat.