Michigan Maple Block Query

I am considering a Michigan Maple Block AJA02015 audio platform/cutting board, 18" x 18" x 3 1/2", to replace a shelf in my audio rack for supporting a DAC. The thickness also ideally raises the height of the DAC in the rack. My concern is that it is unsealed maple. Preferably, I would like it black or, minimally, sealed in some way, because the shade of the maple is something I can live with. I am looking for suggestions regarding this. Should I be concerned if left unsealed for this application or not? Thanks in advance.