Get the uncoated one and use this.http://www2.dupont.com/Stone_Care/en_US/products/prod_pgs/sealer.htmlUntreated marble, especially light-colored marble, is prone to staining. If it is somewhere where there is any risk of that, you do need to seal it. Otherwise, the first time you spill some wine, you will be . . . displeased.This stuff works great. The only thing is that you need to re-apply it every few years. But all you have to do is wipe it on and let it dry.