Hello

Im going to be tiling the front of my bath which I have made from 12mm
marine ply (as discussed a few months back)

It was also said to seal it with diluted PVA to stop the tile adhesive
soaking in to the wood to quickly.

What ratio water to PVA is it.

Alternatively, instead of using diluted PVA, can I just use a matt paint, as
I have loads of that in the garage

thanks in advance