The very process (vacuum) that would draw out the moisture would also draw out any sealants or preservatives you've coated the wood with. You'd want to use the vacuum to draw out the moisture and such,end the vacuum, apply the desired coatings/penetrants, and use pressure to force them in. That's the process used to apply chrome copper, aka pressure treated wood. It works well.

> been working on for something else. My idea. A piece of capped 6 or
> 8 inch diameter pipe with a recycled refrigerator or freezor compressor
> adapted to be a vacuum pump. The wood strips would then be put into
> the pipe the autoclave like door wood be closed and the "vacuum"
> pump would be started. Excess moisture would be drawn out of the wood
> and sealants or preservatives would be drawn into the wood. A few
> considerations would have to be observed. Volitile solvents also boil
> at the lower pressures in the chamber. Some of the newer water based
> varnishes would likely not be harmed by the water vapor boiling out
> of the wood. I haven't tried this so experimentation would be required
> to test these theories.