Bought a counter top, wood butcher block as they called it, to install on my work bench. Top is raw wood. Instructions state seal immediately with Tung or Mineral spirits. Minerals Spirits? That doesn't make sense to me. What would you suggest. I live in Colorado, arid climate. Thanks in advance for any suggestions.
Since it is for a workbench i would recommend that you not use a polyurethane or varnish, maybe shellac.
I researched this for my workbench and decided on a mix of boiled linseed oil and beeswax.
I think i went with 1 part wax added to 4 parts oil. Once melted together it is a liquid but left to cool to room temp it "solidifies" to a soft-ish paste.
To apply you warm it to a liquid ( not real hot but beyond lukewarm ) and rub it in with a rag, buffing prior to each new coat and after the final coat. Three or five coats over as many days.
If you do not want to make your own you can buy some, i like Darbin Orvar's tutorials and she has some nice products. ( i am not affiliated, just a fan )
Here is an article on it in popular woodworking