What are you sealing it from?
But first of all what brand shaft is this? There's two on the market that's different from the rest in terms of the surface, that's Pechauer and McDermott. Pechauer states you should use pledge or a similar product. McDermott Siege just have a weird coating you will have to live with. All other shafts I know of cleans easily with denatured alcohol, no need for any further polish and certainly no sealer of any sort.
there's also whyte carbon