A good rule of thumb for sealing marine plywood is to apply as many layers of sealer as there are layers in the plywood.
Seal plywood floor on boat.
Therefore it is imperative to use the best paint for wood dock when sealing plywood.
You ll find a lot of debate over epoxy encapsulation may people feel it just leads to checking on plywood particularly douglas fir which is great boat building wood btw and at the most epoxy alone just penetrates a millimeter or two into the wood.
This plywood is formulated to resist water and moisture on its own.
However usually the materials in the wood are not enough to block all moisture from the wood.
If you have purchased plywood with six layers for example apply six layers of epoxy to seal it.
Whether you are creating an easy floor or a.
With normal plywood you would use two coats of sealer maybe even three.
Note that even though the plywood has been snapped and left exposed to rain and wind it still holds its integrity.
A scratch penetrates that pretty easily.
However once the sealer is applied to the plywood and dried you will want to wipe the wood down with a damp cloth and sand it lightly with a 100 to 200 grit sandpaper.
I ve built a couple boats.
Plywood while a relatively inexpensive product to use can be particularly tricky when it comes to finishing.
It is almost always necessary to coat the marine plywood in additional sealer to block all moisture from the pores of the wood.
Photo d is a piece of plywood from the floor of a boat wreck.
Learn the principles and techniques of coating plywood with west system 105 epoxy resin and 207 special coating hardener.