With normal plywood you would use two coats of sealer maybe even three.
Seal plywood floor on boat.
Photo d is a piece of plywood from the floor of a boat wreck.
It is almost always necessary to coat the marine plywood in additional sealer to block all moisture from the pores of the wood.
A good rule of thumb for sealing marine plywood is to apply as many layers of sealer as there are layers in the plywood.
Therefore it is imperative to use the best paint for wood dock when sealing plywood.
Whether you are creating an easy floor or a.
If you have purchased plywood with six layers for example apply six layers of epoxy to seal it.
I ve built a couple boats.
This plywood is formulated to resist water and moisture on its own.
This was located underneath a faux teak floor meaning that it is most likely the original plywood used to build the floor of the boat.
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.
A scratch penetrates that pretty easily.
Note that even though the plywood has been snapped and left exposed to rain and wind it still holds its integrity.
The best ways to paint and seal plywood.
However usually the materials in the wood are not enough to block all moisture from the wood.
Plywood while a relatively inexpensive product to use can be particularly tricky when it comes to finishing.